Homework Answers
a) Standard molar entropy of liquid water = S0m (water)= 65 J.K-1.mol-1
Standard molar entropy of ice = S0m (ice)= 43 J.K-1.mol-1
these are standard values, they can not be derived. You can use data table or if you want, only if you want, you can memorize.
b) Standard molar entropy change due to conversion of ice to
water = 
Again, equation of standard molar entropy change of phase
transition is given by, 
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E5.1 a) What is Som for ice at 273K? What is Som for water at 273K? b) What is Acewt a73K? b) What is ASnice swater at 273K? ice->water C ice->water E5.1 a) What is Som for ice at 273K...
The change in enthalpy when 1 mol of ice is melted at 273K is 6008 J Heat Capacity of liquid water, Cp_{L} = 75.44 J/mol K Heat Capacity of solid water, Cp_{S} = 38J/mol K Enthalpy chage of melting at...
The change in enthalpy when 1 mol of ice is melted at 273K is 6008 J Heat Capacity of liquid water, Cp_{L} = 75.44 J/mol K Heat Capacity of solid water, Cp_{S} = 38J/mol K Enthalpy chage of melting at 273K, \Delta H_{273}=6008 J Calculate the standard enthalpy of fusion for ice. Calculate the heat released when 100 g of water supercooled at 250K solidify Initial T=25°C=298K Thanks
How much heat is required to convert 155g of ice at -10°C into water vapor at...
How much heat is required to convert 155g of ice at -10°C into water vapor at 110°C? sice = 2.09J/g·°C, swater = 4.18J/g·°C, svapor = 1.84J/g·°C, ΔHfusion = 6.01kJ/mol, ΔHvap = 40.67kJ/mol
Ice at 0.0 °C is used to cool water. What is the minimum mass of ice...
Ice at 0.0 °C is used to cool water. What is the minimum mass of ice required to cool 325 g of water from 30.5 °C to 4.0 °C? (Heat of fusion = 333 J/g; specific heat capacities ice = 2.06 J/gK, liquid water = 4.184 J/g-K) a. 108 g b. 125 g c. 325 g d. 605 g e, 1.75 ×104 g 22.
Model 1: The Melting of Ice. H20(s) == H2O(l) (T = 273K) Critical Thinking Questions 1....
Model 1: The Melting of Ice. H20(s) == H2O(l) (T = 273K) Critical Thinking Questions 1. Recall that AH is positive for the melting of ice. In general, does AH > 0 tend to be the case for naturally occurring processes? 2. Do you expect AS to be positive or negative for the melting of ice? Explain your reasoning
__________ has the greatest thermal energy. A. Ice B. Dry ice C. Steam D. Water
__________ has the greatest thermal energy. A. Ice B. Dry ice C. Steam D. Water
15. A block of ice at 0°C is loating on the surface of ice water in...
15. A block of ice at 0°C is loating on the surface of ice water in a beaker. The surface of the wate just comes to the top of the beaker. When the ice melts the water level will: (a) fall (b) remain the same (c) rise (d) cannot be determined with the given information 16. How much heat is required to convert 100 g of water at 20° to steam? (a) 2.5 x 10 J (b) 2.6 x 105...
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.
What mass of ice would it take to lower the temperature of 0.5kg of water 20°C...
What mass of ice would it take to lower the temperature of 0.5kg of water 20°C to 0°C. 7. from A 100-g piece of iron is heated to 100°C and then dropped into a cavity in a large block ofice at 0°C. How much mass of ice will melt? 8. 50 grams of hot water at 80°C is poured into a cavity in a very large block ofice at 0°C. The final temperature of the water in the cavity is...
An ice cube floats in a beaker of ice cold water. Since the water is ice...
An ice cube floats in a beaker of ice cold water. Since the water is ice cold, the ice cube is not melting and hence its volume is not changing. The density of water and ice are, respectively, ρw = 1,000 kg/m3 and ρi = 917 kg/m3. (Assume one of the ice cube's faces is parallel to the water's surface.) (a) If the ice cube is 17.0 mm on each side, how far below the surface (in mm) is the...
a 10 g ice cube at -10 degree c is dropped into 40 g of water...
a 10 g ice cube at -10 degree c is dropped into 40 g of water at 30 degree c. a) after enough time has passed to allow the ice cube and water to come to equilibrium, what is the temp of the water? B) if a second ice cube is added, what will the temp be?
Ice at 0.0 °C is used to cool water. What is the minimum mass of ice required to cool 325 g of water from 30.5 °C to 4.0 °C? (Heat of fusion = 333 J/g; specific heat capacities ice = 2.06 J/gK, liquid water = 4.184 J/g-K) a. 108 g b. 125 g c. 325 g d. 605 g e, 1.75 ×104 g 22.
Model 1: The Melting of Ice. H20(s) == H2O(l) (T = 273K) Critical Thinking Questions 1. Recall that AH is positive for the melting of ice. In general, does AH > 0 tend to be the case for naturally occurring processes? 2. Do you expect AS to be positive or negative for the melting of ice? Explain your reasoning
15. A block of ice at 0°C is loating on the surface of ice water in a beaker. The surface of the wate just comes to the top of the beaker. When the ice melts the water level will: (a) fall (b) remain the same (c) rise (d) cannot be determined with the given information 16. How much heat is required to convert 100 g of water at 20° to steam? (a) 2.5 x 10 J (b) 2.6 x 105...
What mass of ice would it take to lower the temperature of 0.5kg of water 20°C to 0°C. 7. from A 100-g piece of iron is heated to 100°C and then dropped into a cavity in a large block ofice at 0°C. How much mass of ice will melt? 8. 50 grams of hot water at 80°C is poured into a cavity in a very large block ofice at 0°C. The final temperature of the water in the cavity is...
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