A freezer is used to freeze 1 kg of water completely into ice. The water and...
PROBLEMS: SHOW YOUR WORK 1. A freezer is used to freeze 1 kg of water completely into ice. The water and the freezer remain at a constant temperature of 0°C. a. Determine the change in entropy of the water Ans. b. Determine the change in entropy of the freezer.
A freezer is used to freeze 3.7 L of water completely into ice. The water and the freezer remain at a constant temperature of T 0°C (a) Determine the change in the entropy of the water kJ/K (b) Determine the change in the entropy of the freezer kJ/K
A freezer is used to freeze 2.4 L of water completely into ice. The water and the freezer remain at a constant temperature of T = 0°C. (a) Determine the change in the entropy of the water. kJ/K (b) Determine the change in the entropy of the freezer. kJ/K
A freezer has a performance coefficient k=3. The freezer is to convert 0.80 kg of water at T = 20 °C into 0.80 kg of ice at T= -10 °C in 1 hour. (a) At what rate must heat be removed from the water at 20 °C to convert it to ice at -10 °C. (b) What is the electrical power consumed by the freezer during this hour? (c) At what rate is the wasted heat rejected to the room...
We want to determine how much the room temperature increases when a kg of ice freezes.Suppose you have a freezer that needs 1 J of energy for every 3 J of heat it removes.How much thermal energy must be removed from 1 kg of water at room temperature? How much electrical energy is used to freeze the ice?What is the total energy, including waste heat, that is dumped into the kitchen? If the kitchen contains 40 kg of air, how...
I have a 1.3 kg block of ice that I pull out of the freezer. That block of ice is initially at a temperature of -20 °C . How much heat is required for this block of ice to turn into 1.3 kg of liquid water at 20 °C.
4-10. The latent heat of fusion of ice is 333 kJ/kg. In the freezer compartment of a refrigerator, a tray holds 12 cubes of water each of mass 8.0 g. If the C.O.P. of the refrigerator is 3.3. how many kilowatt-hours of electrical energy would be required to run the refrigerator to change the water cubes (at 0°C) into ice cubes (at 0°C)?
m Rev A Carnot freezer that runs on electricity removes heat from the freezer compartment, which is at -10°C and expels it into the room at 25°C. You put an ice-cube tray containing 425 g of water at 12 C into the freezer. Part A What is the coefficient of performance of this freezer? AZOO ? K = Submit Request Answer Part B How much energy is needed to freeze this water? Assume at the end of the process all...
One kilogram of chilled water (0°C) is placed in a freezer which is kept at 0°F (-18°C). Approximately how much electric energy (in kilocalories) is needed just to freeze the water if the room temperature is maintained at 75°F (24°C)? (Lice = 333 J/g; cice = 2.09 J/g∙°C.) ANS = 13.1 kcal i dont know why for Qc you only include the latent heat of fusion and not include the energy required to the change the temp. of chilled water...
(a) What is the entropy change of a 11.8 g ice cube that melts completely in a bucket of water whose temperature is just above the freezing point of water? (b) What is the entropy change of a 8.39 g spoonful of water that evaporates completely on a hot plate whose temperature is slightly above the boiling point of water?