Exercise 17.102 The ?G for the freezing of H2O(l) at -10 ?C is-210 J/mol and the...
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Exercise 17.102 The ?G for the freezing of H2O(l) at -10 ?C is-210 J/mol and the heat of fusion of ice at this temperature is 5610 J/mol . |
Part A Find the entropy change of the universe when 2mol of water freezes at -10 ?C.
I got -44 but it says I am incorrect. Any help would be greatly appreicated |
Homework Answers
Answer: The entropy change is - 41.042 J/K
The solution to the given problem is as below.
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Exercise 17.102
The ?G for the freezing of H2O(l) at -10 ?C is-210
J/mol and the...
The ΔG for the freezing of H2O(l) at -10 ∘C is-210 J/mol and the heat of...
The ΔG for the freezing of H2O(l) at -10 ∘C is-210 J/mol and the heat of fusion of ice at this temperature is 5610 J/mol . Find the entropy change of the universe when 3 mol of water freezes at -10 ∘C.
The ΔG for the freezing of H2O(l) at -10 ∘C is -210 J/mol and the heat of fusion of ice at this t...
The ΔG for the freezing of H2O(l) at -10 ∘C is -210 J/mol and the heat of fusion of ice at this temperature is 5610 J/mol . Find the entropy change of the universe when 2 mol of water freezes at -10 ∘C. (in J/K)
i got this question wrong. the book previously said that the units of entropy are J/(mol*K)....
i got this question wrong. the book previously said that the
units of entropy are J/(mol*K). you can get mol with the grams that
they gave, so why not use it?
Example: If, in a reversible process, 6.66 x 10 J of heat is used to change a 200 g block of ice to water at a temperature of 273 K, what is the change in the entropy of the system? (Note: The heat of fusion of ice = 333...
The constant-pressure molar heat capacity of H2O (s) and H2O (l) is 75.291 J K−1 mol−1...
The constant-pressure molar heat capacity of H2O (s) and H2O (l) is 75.291 J K−1 mol−1 and that of H2O (g) is 33.58 J K−1 mol−1 . Assume that the constant-pressure molar heat capacities are constant over the studied temperature range. Calculate the change in entropy of the system when 15.0 g of ice at −12.0 °C is converted to water vapour at 105.0 °C at a constant pressure of 1 bar!
An ice cube of mass 9.0g is added to a cup of coffee, whose temperature is 90.0 °C and which contains 120.0 g of li...
An ice cube of mass 9.0g is added to a cup of coffee, whose temperature is 90.0 °C and which contains 120.0 g of liquid. Assume the specific heat capacity of the coffee is the same as that of water. The heat of fusion of ice (the heat associated with ice melting) is 6.0kJ/mol. Find the temperature of the coffee after the ice melts. Use the equation given in the lab manual on page 86. Ignore the + (CC) (AT)...
13 V.7790 X 10° kg mo, and its vapor pressure is 489 Pa. 4.18 Calculate the molar Gibbs energy G of fusion when su-...
13 V.7790 X 10° kg mo, and its vapor pressure is 489 Pa. 4.18 Calculate the molar Gibbs energy G of fusion when su- percooled water at -3 °C freezes at constant T and P. The en- thalpy of fusion of ice is 6000 J mol-1 at 0 °C. The heat capacities of water and ice in the vicinity of the freezing point are 75.3 and 38 JK- mol-, respectively. ion ate
The constants for H2O are shown here: Specific heat of ice: sice=2.09 J/(g⋅∘C) Specific heat of...
The constants for H2O are shown here: Specific heat of ice: sice=2.09 J/(g⋅∘C) Specific heat of liquid water: swater=4.18 J/(g⋅∘C) Enthalpy of fusion (H2O(s)→H2O(l)): ΔHfus=334 J/g Enthalpy of vaporization (H2O(l)→H2O(g)): ΔHvap=2250 J/g Part A How much heat energy, in kilojoules, is required to convert 73.0 g of ice at −18.0 ∘C to water at 25.0 ∘C ? Express your answer to three significant figures and include the appropriate units. 6.56 kJ is incorrect.
Substance molar heat capacity (C.)/J•mol-1.°C-1 75.3 specific heat capacity (C.) /J•g-lo°C-1 0.384 H2O(1) Cu(s) C,H,OH(l) (ethanol)...
Substance molar heat capacity (C.)/J•mol-1.°C-1 75.3 specific heat capacity (C.) /J•g-lo°C-1 0.384 H2O(1) Cu(s) C,H,OH(l) (ethanol) Fe(s) 111.5 0.449 1. Fill in the empty entries in the table above. 2. If the same amount of energy is transferred to 1.0 g samples of each of the substances listed above, order them from largest AT to smallest AT. Explain. 3. Which is the consequence of copper's relatively low specific heat (0.385 J/(g°C)) compared to water (4.18 J/(g°C)) on the temperature change...
30. How much heat energy, in joules, is required to raise the temperature of 1 mole of sulfur from 100. to 500.°C? S...
30. How much heat energy, in joules, is required to raise the temperature of 1 mole of sulfur from 100. to 500.°C? Specific heat for sulfur is 0.705 J/g-°C. a. 280 b. 1.28 X 104 c. 9.04 X 103 d. 22.6 e. 567 31. What is the final temperature, in °C, when 60.0 g of water at 80°C is mixed with 40.0 g of water at 25°C? The specific heat of water is 4.184 J/g-°C. a. 53 b. 58 c....
10. Given the following table: Compound NO: (g) N:O (g) AHP (J mol) AGP (J mol) 51.84 33.85 9.66 98.29 For t...
10. Given the following table: Compound NO: (g) N:O (g) AHP (J mol) AGP (J mol) 51.84 33.85 9.66 98.29 For the reaction: N:Oa (g) eo 2NO: (g) (a) Use the information in the Table to calculate AG for the reaction (b) Use the information in the Table to calculate AH" for the reaction (c) Calculate K, at 25 C. (d) Calculate K, at 1600 °C. (Assume AH to be temperature independent) (e) Calculate the degree of dissociation, a, of...
i got this question wrong. the book previously said that the
units of entropy are J/(mol*K). you can get mol with the grams that
they gave, so why not use it?
Example: If, in a reversible process, 6.66 x 10 J of heat is used to change a 200 g block of ice to water at a temperature of 273 K, what is the change in the entropy of the system? (Note: The heat of fusion of ice = 333...
An ice cube of mass 9.0g is added to a cup of coffee, whose temperature is 90.0 °C and which contains 120.0 g of liquid. Assume the specific heat capacity of the coffee is the same as that of water. The heat of fusion of ice (the heat associated with ice melting) is 6.0kJ/mol. Find the temperature of the coffee after the ice melts. Use the equation given in the lab manual on page 86. Ignore the + (CC) (AT)...
13 V.7790 X 10° kg mo, and its vapor pressure is 489 Pa. 4.18 Calculate the molar Gibbs energy G of fusion when su- percooled water at -3 °C freezes at constant T and P. The en- thalpy of fusion of ice is 6000 J mol-1 at 0 °C. The heat capacities of water and ice in the vicinity of the freezing point are 75.3 and 38 JK- mol-, respectively. ion ate
Substance molar heat capacity (C.)/J•mol-1.°C-1 75.3 specific heat capacity (C.) /J•g-lo°C-1 0.384 H2O(1) Cu(s) C,H,OH(l) (ethanol) Fe(s) 111.5 0.449 1. Fill in the empty entries in the table above. 2. If the same amount of energy is transferred to 1.0 g samples of each of the substances listed above, order them from largest AT to smallest AT. Explain. 3. Which is the consequence of copper's relatively low specific heat (0.385 J/(g°C)) compared to water (4.18 J/(g°C)) on the temperature change...
30. How much heat energy, in joules, is required to raise the temperature of 1 mole of sulfur from 100. to 500.°C? Specific heat for sulfur is 0.705 J/g-°C. a. 280 b. 1.28 X 104 c. 9.04 X 103 d. 22.6 e. 567 31. What is the final temperature, in °C, when 60.0 g of water at 80°C is mixed with 40.0 g of water at 25°C? The specific heat of water is 4.184 J/g-°C. a. 53 b. 58 c....
10. Given the following table: Compound NO: (g) N:O (g) AHP (J mol) AGP (J mol) 51.84 33.85 9.66 98.29 For the reaction: N:Oa (g) eo 2NO: (g) (a) Use the information in the Table to calculate AG for the reaction (b) Use the information in the Table to calculate AH" for the reaction (c) Calculate K, at 25 C. (d) Calculate K, at 1600 °C. (Assume AH to be temperature independent) (e) Calculate the degree of dissociation, a, of...
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