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Question 5 (0.5 marks) Chlorofluorocarbons such as CF3Cl2 have been used as refrigerants. The standard enthalpy...
Question 5 (0.5 marks) Chlorofluorocarbons such as CF2Cl2 have been used as refrigerants. The standard enthalpy...
Question 5 (0.5 marks) Chlorofluorocarbons such as CF2Cl2 have been used as refrigerants. The standard enthalpy of vaporization of CF2Cl2 is 15.4 kJ/mol. Calculate the mass (kg) of liquid CF2Cl2 needed to cool 500.0 g of water from 60.0 °C to 40.0 °C. You may need to obtain some data from your textbook when answering this question. Mass of CF2Cl2 required:
Chlorofluorocarbons such as CF2CI2 have been used as refrigerants.. The standard enthalpy of vaporization of CF2Cl2...
Chlorofluorocarbons such as CF2CI2 have been used as refrigerants.. The standard enthalpy of vaporization of CF2Cl2 is 15.4 kJ/mol. Calculate the mass (kg) of liquid CF2CI2 needed to cool 500.0 g of water from 60.0 "C to 40.0 °C. You may need to obtain some data from your textbook when answering this question. Mass of CF2CI2 required:
5. (4 pts) The compound C2C13F3 has been used as a cooling agent in refrigerants and...
5. (4 pts) The compound C2C13F3 has been used as a cooling agent in refrigerants and air conditioners. It has a boiling point of 47.6 °C. The specific heats of C2Cl3F3 (l) and C2C13F3 (g) are 0.91 Jg-2 K-2 and 0.67 Jg-1K-2, respectively. The heat of vaporization for the compound is 27.49 kJ/mol. Calculate the heat absorbed by 35.0 g of C2C13F3 while going from a liquid at 10.00 °C to a gas at 105.00 °C.
Question 6 (0.5 marks) Two solids, 4.20 g of sodium hydroxide and 5.00 g potassium hydroxide...
Question 6 (0.5 marks) Two solids, 4.20 g of sodium hydroxide and 5.00 g potassium hydroxide are added to 200.0 mL of water in a calorimeter. If the initial temperature of the water is 20.0 °C, Asolution H (NaOH) = - 44.3 kJ/mol, and solution H (KOH) = -56.0 kJ/mol, calculate the final temperature of the solution. You may need to obtain some data from your textbook when answering this question. Assume the specific heat capacity of the solution is...
Question 6 (0.5 marks) Two solids, 4.20 g of sodium hydroxide and 5.00 g potassium hydroxide...
Question 6 (0.5 marks) Two solids, 4.20 g of sodium hydroxide and 5.00 g potassium hydroxide are added to 200.0 mL of water in a calorimeter. If the initial temperature of the water is 20.0 °C, Asolution H (NaOH) = -44.3 kJ/mol, and solution (KOH) = -56.0 kJ/mol, calculate the final temperature of the solution. You may need to obtain some data from your textbook when answering this question. Assume the specific heat capacity of the solution is the same...
In the textbook used in class the specific enthalpy in the state is correct for 160bar...
In the textbook used
in class the specific
enthalpy in the state
is correct for 160bar
Problem 4: Consider the refrigeration system shown below. The refrigerant is R-22, and the refrigerant mass flow rate is 0.2 kg/s. Assume no kinetic or potential energy effects, and no heat transfer from the compressor or the expansion valve. Evaporator W comp Exp. Valve Comp Condenser State 1 State 4 State 2 P2 = 10 bar State 3 P3 = 10 bar T4 =...
Question 7 (1 mark) Consider the reaction between aqueous sodium hydroxide and silver cation: 2 NaOH (aq) + 2 Ag+ (...
Question 7 (1 mark) Consider the reaction between aqueous sodium hydroxide and silver cation: 2 NaOH (aq) + 2 Ag+ (aq) → Ag20 (s) + H20 (1) + 2 Na+ (aq) a) Given the data in the table below, calculate the standard enthalpy change (in kJ) for the reaction. Compound Ag+ (aq) Ag20 (s) H2O (1) Na+ (aq) NaOH (aq) A/H (kJ/mol) 100.0 - 50.0 - 275.0 - 250.0 -475.0 b) When the reaction was performed in a constant pressure...
Question 5 (20 marks) Consider the Methylcyclohexane (MCH)-Cyclohexane system. Methylcyclohexane ...
Question 5 (20 marks) Consider the Methylcyclohexane (MCH)-Cyclohexane system. Methylcyclohexane (CH4) has a normal boiling point of 101 °C, a molecular mass of 98.19 g/mol, and a specific gravity of 0.7694. a) Calculate the vapour and liquid compositions at a bubble point temperature of 89.4 °C and total pressure of 1 atm. You can assume tabulated values are valid outside of the range given b) Sketch the V-L diagram for the MCH-Cyclohexane system at 1 atm total pressure using the...
12:47 1 Exit Question 1 0.5 pts When 34.8 g of sodium chloride is dissolved in...
12:47 1 Exit Question 1 0.5 pts When 34.8 g of sodium chloride is dissolved in water, 2.31 kJ of energy is absorbed. Is the enthalpy of dissolution of NaCl exothermic or endothermic? Endothermic Exothermic Question 2 0.5 pts What is the balanced thermochemical equation for the combustion of two moles of gaseous acetylene, C2H2, with oxygen to produce carbon dioxide and water vapor at 24.59°C given that 2512 kJ of heat is released at a constant pressure of 1.14...
Question Number 1 (25 Marks) A mass of 0.5 kg of ammonia is contained in a...
Question Number 1 (25 Marks) A mass of 0.5 kg of ammonia is contained in a piston-cylinder assembly, initially at T1 = -20°C and U1 = 391.11 kJ/kg. The ammonia is slowly heated to state 2, where T2 = 20°C and P2 = 0.6 MPa, and the pressure varies linearly with specific volume during this process. From state 2, the system isºcompressed at constant pressure until the ammonia becomes a fully saturated vapor. Assume that there are no significant change...
Question 5 (0.5 marks) Chlorofluorocarbons such as CF2Cl2 have been used as refrigerants. The standard enthalpy of vaporization of CF2Cl2 is 15.4 kJ/mol. Calculate the mass (kg) of liquid CF2Cl2 needed to cool 500.0 g of water from 60.0 °C to 40.0 °C. You may need to obtain some data from your textbook when answering this question. Mass of CF2Cl2 required:
Chlorofluorocarbons such as CF2CI2 have been used as refrigerants.. The standard enthalpy of vaporization of CF2Cl2 is 15.4 kJ/mol. Calculate the mass (kg) of liquid CF2CI2 needed to cool 500.0 g of water from 60.0 "C to 40.0 °C. You may need to obtain some data from your textbook when answering this question. Mass of CF2CI2 required:
5. (4 pts) The compound C2C13F3 has been used as a cooling agent in refrigerants and air conditioners. It has a boiling point of 47.6 °C. The specific heats of C2Cl3F3 (l) and C2C13F3 (g) are 0.91 Jg-2 K-2 and 0.67 Jg-1K-2, respectively. The heat of vaporization for the compound is 27.49 kJ/mol. Calculate the heat absorbed by 35.0 g of C2C13F3 while going from a liquid at 10.00 °C to a gas at 105.00 °C.
Question 6 (0.5 marks) Two solids, 4.20 g of sodium hydroxide and 5.00 g potassium hydroxide are added to 200.0 mL of water in a calorimeter. If the initial temperature of the water is 20.0 °C, Asolution H (NaOH) = - 44.3 kJ/mol, and solution H (KOH) = -56.0 kJ/mol, calculate the final temperature of the solution. You may need to obtain some data from your textbook when answering this question. Assume the specific heat capacity of the solution is...
Question 6 (0.5 marks) Two solids, 4.20 g of sodium hydroxide and 5.00 g potassium hydroxide are added to 200.0 mL of water in a calorimeter. If the initial temperature of the water is 20.0 °C, Asolution H (NaOH) = -44.3 kJ/mol, and solution (KOH) = -56.0 kJ/mol, calculate the final temperature of the solution. You may need to obtain some data from your textbook when answering this question. Assume the specific heat capacity of the solution is the same...
In the textbook used
in class the specific
enthalpy in the state
is correct for 160bar
Problem 4: Consider the refrigeration system shown below. The refrigerant is R-22, and the refrigerant mass flow rate is 0.2 kg/s. Assume no kinetic or potential energy effects, and no heat transfer from the compressor or the expansion valve. Evaporator W comp Exp. Valve Comp Condenser State 1 State 4 State 2 P2 = 10 bar State 3 P3 = 10 bar T4 =...
Question 7 (1 mark) Consider the reaction between aqueous sodium hydroxide and silver cation: 2 NaOH (aq) + 2 Ag+ (aq) → Ag20 (s) + H20 (1) + 2 Na+ (aq) a) Given the data in the table below, calculate the standard enthalpy change (in kJ) for the reaction. Compound Ag+ (aq) Ag20 (s) H2O (1) Na+ (aq) NaOH (aq) A/H (kJ/mol) 100.0 - 50.0 - 275.0 - 250.0 -475.0 b) When the reaction was performed in a constant pressure...
Question 5 (20 marks) Consider the Methylcyclohexane (MCH)-Cyclohexane system. Methylcyclohexane (CH4) has a normal boiling point of 101 °C, a molecular mass of 98.19 g/mol, and a specific gravity of 0.7694. a) Calculate the vapour and liquid compositions at a bubble point temperature of 89.4 °C and total pressure of 1 atm. You can assume tabulated values are valid outside of the range given b) Sketch the V-L diagram for the MCH-Cyclohexane system at 1 atm total pressure using the...
12:47 1 Exit Question 1 0.5 pts When 34.8 g of sodium chloride is dissolved in water, 2.31 kJ of energy is absorbed. Is the enthalpy of dissolution of NaCl exothermic or endothermic? Endothermic Exothermic Question 2 0.5 pts What is the balanced thermochemical equation for the combustion of two moles of gaseous acetylene, C2H2, with oxygen to produce carbon dioxide and water vapor at 24.59°C given that 2512 kJ of heat is released at a constant pressure of 1.14...
Question Number 1 (25 Marks) A mass of 0.5 kg of ammonia is contained in a piston-cylinder assembly, initially at T1 = -20°C and U1 = 391.11 kJ/kg. The ammonia is slowly heated to state 2, where T2 = 20°C and P2 = 0.6 MPa, and the pressure varies linearly with specific volume during this process. From state 2, the system isºcompressed at constant pressure until the ammonia becomes a fully saturated vapor. Assume that there are no significant change...
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