Assuming that a domestic refrigerator can be regarded as a reversivle engine working between the temperature of melting ice and that of the atmosphere `(170^(@)C)`, calculate the energy which muct be supplied to freeze one kilogram of water already at `0^(@)C`.

A refrigerator works between temperature of melting ice and room temperatures (17^(@)C) . The amount of energy (in kWh) that must be supplied to freeze I kg of water at 0^(@)C is

Assuming a domestic refrigerator a reversible engine working between melting point of ice and the room temperature of 17^@C .Calculate the enrgy in joule that m ust be suppled to freeze 2kg of water .Given that temperature of water = 0^@C nd L=80 cal//g .

A refrigerator is working between the temperature of melting ice and room temperature, which is 290 K. Calculate work done by the refrigerator to freeze 2 kg of water.

Calculate the coefficient of performance of refrigerator working between the temperatures 0^(@)C and 30^(@)C.

A Carnot engine works between temperature 0^(@)C and 100^(@)C . Calculate its efficiency.

A locomotive engine operates between a boiler temperature of 100^@C and an outside temperature of 40^@C . Calculate the maximum fraction of heat from the boiler that can be transformed into mechanical work.

In summer, Kamal decides to take a bath at noon. Temperature of the water in overhead tank is 45^(@)C so he decides to mix ince from refrigerator. The temperature of the ice in refrigerator. The temperature of the ice in refrigerator is -10^(@)C . How much ice will be needed to prepare 20 kg of water at 25^(@)C for bath? (Assume no loss to surrounding latent heat of fusion of ice =80cal//gm , specific heat of ice =0.5cal//gm^(@)C

In summer, Kamal decides to take a bath at noon. Temperature of the water in overhead tank is 45^(@)C so he decides to mix ince from refrigerator. The temperature of the ice in refrigerator. The temperature of the ice in refrigerator is 10^(@)C . How much ice will be needed to prepare 20 kg of water at 25^(@)C for bath? (Assume no loss to surrounding latent heat of fusion of ice =80cal//gm , specific heat of ice =0.5cal//gm^(@)C

A refrigerator freezes 5 kg of water at 0^(@)C into ice at 0^(@)C in a time internal of 20 minutes. Assume that the room temperature is 20^(@)C . Calculate the minimum power needed to accomplish it.