At 0 ° C the sublimation heat of the ice is 675.7 cal / g, while the heat of vaporization of the water is 595.9 cal / g. Calculating the rate of change of pressure steam temperature and ice water at 0 ° C. At this temperature the pressure of water vapor is 4.58 mm Hg.
1. At 0 ° C the sublimation heat of the ice is 675.7 cal / g, while the heat of vaporization of the water is 595.9 cal / g. Calculating the rate of change of pressure steam temperature and ice water at 0 ° C. At this temperature the pressure of water vapor is 4.58 mm Hg.
Jawaban:
The rate of change of pressure with temperature for a substance in a given phase (solid, liquid, or gas) is determined by its vapor pressure curve. The vapor pressure curve shows the pressure of a substance's vapor in equilibrium with its condensed phase (solid or liquid) at a given temperature.
For water, the vapor pressure curve shows that the vapor pressure of water increases as the temperature increases. At 0 °C, the vapor pressure of water is 4.58 mm Hg. As the temperature increases, the vapor pressure of water will also increase, and the rate of change of pressure with temperature will be positive.
The sublimation heat of ice (675.7 cal/g) and the heat of vaporization of water (595.9 cal/g) are both related to the energy required to change the phase of water (from solid to vapor or liquid to vapor, respectively). These values are not directly related to the vapor pressure curve and do not affect the rate of change of pressure with temperature at a given temperature.
Jawaban:
= -37.5 atm/s
Penjelasan:
To calculate the rate of change of pressure for steam and ice water at 0°C, we can use the rate of change of pressure equation, which is defined as the change in pressure per unit time. This equation can be written as follows:
ΔP/Δt = hL(Pv - P)
where:
ΔP is the change in pressure
Δt is the change in time
hL is the rate of change of pressure, which is a constant that depends on the temperature and density of the fluid
Pv is the vapor pressure of the fluid
P is the current pressure of the fluid
To calculate the rate of change of pressure for steam at 0°C, we can use the values given in the question, which are:
hL(steam) = (595.9 cal/g) / (18 g/mol) = 33.1 cal/mol.atm
Pv(steam) = 4.58 mm Hg = 0.006 atm
P(steam) = 1 atm (standard atmospheric pressure at 0°C)
Using the above equation, we can calculate the rate of change of pressure for steam at 0°C as follows:
ΔP/Δt = hL(Pv - P)
= (33.1 cal/mol.atm) * (0.006 atm - 1 atm)
= -0.198 atm/s
On the other hand, to calculate the rate of change of pressure for ice water at 0°C, we can use the values given in the question, which are:
hL(ice water) = (675.7 cal/g) / (18 g/mol) = 37.5 cal/mol.atm
Pv(ice water) = 0 atm (the vapor pressure of ice is 0 at 0°C)
P(ice water) = 1 atm (standard atmospheric pressure at 0°C)
Using the above equation, we can calculate the rate of change of pressure for ice water at 0°C as follows:
ΔP/Δt = hL(Pv - P)
= (37.5 cal/mol.atm) * (0 atm - 1 atm)
= -37.5 atm/s
2. Questions 1. From which hole does the water shoot out with the greatesest force? How can you tell? 2. From which hole does the water shoot out with the least force? 3. The force with which water shoots out from a hole increases as the liquid pressure acting on the water at that point increases. At which hole is the liquid pressure (a) the greatest? ...(b) the least? Conclusion Liquid pressure is greater at... than at... and.... As depth increases, liquid pressure...
Jawaban:
Penjelasan:
The greatest force is in the small cross-sectional area, while the smallest force is in the large cross-sectional area
it can be seen in the equation F = P/A
I don't give you a conclusion because maybe that question have a picture
3. If a 3 g sample of alkane is burned, 5,4 g of water vapor is produced. What is the molecular formula of that hydrocarbon?
anda anak mana sih?
ingat alkane memiliki rumus molekul umum CnH2n+2 paham? so... anda misalkan CxHy, paham?, kemudian tulis reaksinya
CxHy(g) + O2 (g) --> CO2 (g) + H2O (g)
kemudian anda cari mol H2O = gram/Mr = 5,4/18 = 0,3 mol
terus gini, karena tidak di ketahui massa CO2 nya kita bisa otak2 atik
kemudian kita bisa gunakan perbandingan molnya...
kalo saya misal pake C2H6 (ethane), so...n hitungh mol dari ethane = gram/molar mass = 3/30 = 0,1 mol kan? kemudian masukan ke reaksi :
reaksinya
C2H6 (g) + 3,5 O2 (g) --> 2 CO2 (g) + 3 H2O (g)
0,1 mol _________________________0,3 mol
apakah sesuai dg hitungan awal kita bahwa H2O adalah 0,3 mol?
so... smg membantu...
4. the water vapor Cools and condenses to become droplest, which form clouds
Jawaban:
uap air mendingin dan mengembun menjadi tetesan, yang membentuk awan
Penjelasan:
maaf kalau salah
5. disposing of co2 and water vapor is through...
through evaporation or transpiration
6. Which of the following has the greatest value?A. 2⁶⁶B. 3⁵⁵C. 4⁴⁴D. 5³³E. 6²²
[tex] {2}^{66} = \sqrt[11]{ {2}^{66} } = {2}^{6} = 64[/tex]
[tex] {3}^{55} = \sqrt[11]{ {3}^{55} } = {3}^{5} = 243[/tex]
[tex] {4}^{44} = \sqrt[11]{ {4}^{44} } = {4}^{4} = 256[/tex]
[tex] {5}^{33} = \sqrt[11]{ {5}^{33} } = {5}^{3} = 125[/tex]
[tex] {6}^{22} = \sqrt[11]{ {6}^{22} } = {6}^{2} = 36[/tex]
Yang memiliki nilai yang terbesar adalah C. 4⁴⁴
Catatan:
Semuanya diakarkan dengan angka yang sama, supaya lebih sederhana dan lebih mudah untuk dihitung.
Terima kasih.
• Academic Test
-
Which of the following has the greastest value ?
•••
Change to the same form , we get :
2⁶⁶ = ( 2⁶ )¹¹ → 64¹¹
3⁵⁵ = ( 3⁵ )¹¹ → 243¹¹
4⁴⁴ = ( 4⁴ )¹¹ → 256¹¹ ← Greatest value
5³³ = ( 5³ )¹¹ → 125¹¹
6²² = ( 6² )¹¹ → 36¹¹
•••
7. Rudolph nureyev (has become) one of the (greatest) (dancer) that the ballet world has (ever known)
Rudolph nureyev (telah menjadi) salah satu (terbesar) (penari) yang pernah (pernah dikenal) dunia balet
8. Calculate the pressure of water on the bottom of a swimming pool if the depth of water in the pool varies between 0.8m and 2.4m (density of water = 1000kg.m3). If atmospheric pressure is 1.01 x 10Pa, calculate the maximum total pressure at the bottom of the swimming pool.
Jawaban:
117 kPa
Penjelasan:
h = 2,4 - 0,8
h = 1,6
density (p) = 1000
Archimedes law
P = p . g . h
P = 1000 . 10 . 1,6
P = 16000
P = 16 kN
P = 16 kPa
Total pressure
Atmosphere pressure + water pressure
1,01 . 10^5 + 16000
101000 + 16000
117000
117 kPa
9. 3. It can be inferred from the passage that.... a. Atmospheric circulation moves water vapor around the sea b. The water cycle describes the continuous movement of water on, above and below the surface of the Earth. c. The sun, which drives the water cycle, heats water in the Misisipi river. d. water evaporates as water vapor into the air as a result of condensation
Jawaban:
b. The water cycle describes the continuous movement of water on, above and below the surface of the Earth.
Penjelasan:
10. A water tank hold 2.000 kg of water and have base area of 1 m2. Pressure at the base of the water tank is ....
Jawaban:
20.000 Pa
Penjelasan:
Pressure (P) is Force or Weigth divide by an base Area.
P = F/A
F = w = mg = 2000 . 10 = 20.000 N
P = 20.000/1 = 20.000 Pascals
or around 0,2 atm
11. The tank is 51m long and 20m wide. The sea-water in the tank is 11m deep and has a density of 1030kg/m³. (a) Calculate the mass of water in the tank. The pressure at point M , halfway down the large viewing panel, is 60kPa more than atmospheric pressure. (b) Calculate the depth of M below the surface of the water. .
Jawaban:
FA = wu – wf
FA = F_A=\rho gVFA=ρgV
Pembahasan
Perhatikan gambar, maka banyak orang yang dapat ditampung adalah
\begin{gathered}W+nW_o=F_a\\10000+n*500=1030*10*5000\\10000+500n=51500000\\500n=51490000\\n=102980 \; orang\end{gathered}W+nWo=Fa10000+n∗500=1030∗10∗500010000+500n=51500000500n=51490000n=102980orang
Penjelasan:
maaf kalau salah Oh
12. 1. The greatest number of cakes sold is _________ which is ________________________. 2. The least number of cakes sold is _________ which is __________________________. 3. The difference of the greatest and the least cake is _____________________. 4. The difference of Black Forest and Brownies is ________________________. 5. The total of all cakes sold is ______________________.
Jawaban:
1. 55 It is chees cake
2. 20 cakes
3. 55–20 = 35
4. 40—20 = 20
5. 40 + 55 + 20 + 35 + 45 = 195 cakes
13. Pressure exerted water at the bottom of the container depends on the.....
The hydrostatics pressure. Maaf kalau salah*
14. the standard pressure at the sea level is 76cmHg.for increasing 10 m from the sea level. the air pressure decreases 1mmHg. if the air pressure of town A located 100 m above sea level is 75 mmHg, so the height town B from the sea level which has pressure of 72,5 cmHg is....
Jawaban:
also peapole +62 bar bar sangad
15. at a coastal area, the vapor pressure of x gram of NaOH solution in 500 gram of water is 1 atmosphere at 100.2°C. if the constant boiling point of water (Kb) is 0.5°C kg/mol, what is the value of x? (Mr NaOH = 40 g/mole)
NaOH ----------------> Na^+ + OH^- (i = 2)
ΔTb = 100,2 - 100 = 0,2
ΔTb = kb . m . i
0,2 = 0,52 . [tex] \frac{gr}{mr} [/tex] . [tex] \frac{1000}{pelarut} [/tex] . 2
0,2 = 0,52 . [tex] \frac{x}{40} [/tex] . [tex] \frac{1000}{500} [/tex] . 2
8 = 0,52 . x. 2. 2
8 = 2,08x
x = 3,85 gram
16. CausemyA large number of soluter existing in a solutiona. the elevation of Saturated vapor pressureb. the elevation of Freezing point.c. the depressionpressured. the depression of boiling pointe. the depression of freezing pointOFOsmotic
Jawaban: E. The depression of freezing point
Penjelasan:
Sifat koligatif larutan ada 4, yakni:
1) Penurunan Tekanan Uap
2) Kenaikan Titik Didih
3) Penurunan Titik Beku
4) Tekanan osmotik
Pilihan a salah, karena kenaikan tekanan uap bukan sifat koligatif larutan. Seharusnya the DEPRESSION of saturated vapor pressure.
Pilihan b salah, karena kenaikan titik beku bukan sifat koligatif larutan. Seharusnya the DEPRESSION of freezing point
Pilihan c salah, karena penurunan tekanan osmotik juga bukan sifat koligatif larutan. Seharusnya kenaikan tekanan osmotik, yakni the ELEVATION of osmotic pressure
Pilihan d salah, karena penurunan titik didih bukan sifat koligatif larutan. Seharusnya the ELEVATION of boiling point.
Pilihan e tepat, karena sesuai dengan penurunan titik beku, yang merupakan salah satu dari 4 sifat koligatif larutan.
Semoga membantu
17. What happens to water vapor when it condenses in the water cycle???
Jawaban:
Condesation ia the change of water from gas form to liquid form. when water vapor in the atmosphere loses heat and cools down, condesation happensPenjelasan:
Kalo ada yang salah maaf ya...dan semoga bermanfaat kawan²...18. the water vapor Cools and condenses to become droplest, which form clouds
SOAL:
the water vapor Cools and condenses to become droplest, which form clouds
TERJEMAHAN:
uap air mendingin dan mengembun menjadi tetesan, yang membentuk awan
WARNING!!!!
✷Jawabantidakcopasdi manapun
✷Noasalasalan
✷Semogamembantu')
19. Rhea has two identical saucers of water. One of them has water and the other has salt water. Without touching the saucers of the water. She wants to find out which one contains the salt water. She places both saucers at her window sill for two days. How will this help her to find out which saucer has the salt water?
Jawaban:
Rhea memiliki dua piring air yang identik. Salah satunya memiliki air dan yang lainnya memiliki air asin. Tanpa menyentuh panci air. Dia ingin mencari tahu mana yang mengandung air asin. Dia menempatkan kedua piring di ambang jendela selama dua hari. Bagaimana ini akan membantunya mengetahui piring mana yang memiliki air asin?
Penjelasan:
Semoga Membantu
20. At 25 c the vapor pressure of pure water is 23.76 mmhg and that of seawater is 22,98 mmhg. Assuming that seawater contains only NaCl, what is the estimate mass of NaCl in 100 grams seawater?
estimate mass of NaCl in 100 grams seawater
mol NaCl x Mr /100
0,94 × 58,5/100
0,5499
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