Heat & Thermodynamics
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Q. A refrigerator removes heat from the interior at a rate of 200 W. If the coefficient of performance (COP) is 4, what is the power consumed by the refrigerator?
Q. How much heat is required to raise the temperature of 250 g of water from 25°C to 75°C? (Specific heat of water = 4.2 J/g°C) (2020)
Q. How much heat is required to raise the temperature of 500 g of water from 25°C to 75°C? (2020)
Q. If 1 kg of water is heated from 25°C to 75°C, how much heat is absorbed? (Specific heat of water = 4.2 J/g°C) (2021)
Q. If 1000 J of heat is added to a gas and it expands doing 400 J of work, what is the change in internal energy? (2023)
Q. If 1000 J of heat is added to a system and 400 J of work is done by the system, what is the change in internal energy of the system? (2021)
Q. If 1000 J of heat is added to a system and it does 400 J of work, what is the change in internal energy? (2021)
Q. If 200 g of water at 80°C is mixed with 300 g of water at 20°C, what will be the final temperature of the mixture? (Assume no heat loss to the surroundings)
Q. If 200 J of heat is added to a system and 50 J of work is done by the system, what is the change in internal energy? (2023)
Q. If 200 J of heat is added to a system and 50 J of work is done by the system, what is the change in internal energy of the system?
Q. If 2000 J of heat is added to a system and 500 J of work is done by the system, what is the change in internal energy of the system? (2021)
Q. If 500 J of heat is added to a system and 200 J of work is done by the system, what is the change in internal energy of the system?
Q. If 500 J of heat is added to a system and it does 200 J of work, what is the change in internal energy? (2022)
Q. If the latent heat of fusion of ice is 334 J/g, how much heat is required to melt 50 g of ice? (2019)
Q. If the latent heat of vaporization of water is 2260 kJ/kg, how much energy is required to convert 0.5 kg of water at 100°C to steam at 100°C?
Q. If the pressure of a gas is increased while keeping the temperature constant, what happens to its volume? (2020)
Q. If the temperature of a gas is doubled at constant volume, what happens to its pressure? (2021)
Q. If the volume of a gas is doubled at constant temperature, what happens to its pressure?
Q. If the volume of a gas is halved at constant temperature, what happens to its pressure? (2023)
Q. If the volume of a gas is halved while keeping the temperature constant, what happens to the pressure of the gas?
Q. In a Carnot engine operating between 500 K and 300 K, what is the maximum efficiency of the engine? (2021)
Q. In a Carnot engine operating between temperatures of 500 K and 300 K, what is the efficiency of the engine? (2023)
Q. In a Carnot engine operating between temperatures of 500 K and 300 K, what is the maximum efficiency? (2023)
Q. In a Carnot engine operating between two heat reservoirs at temperatures 500 K and 300 K, what is the maximum efficiency of the engine? (2023)
Q. In an adiabatic process, the temperature of an ideal gas decreases. What happens to its pressure?
Q. In an isochoric process, what remains constant? (2021)
Q. In an isochoric process, which of the following remains constant? (2022)
Q. In an isothermal process, the temperature of an ideal gas remains constant. If the volume of the gas is doubled, what happens to the pressure? (2020)
Q. What is the change in entropy when 1 kg of water at 100°C is converted to steam at 100°C? (Latent heat of vaporization = 2260 kJ/kg) (2021)
Q. What is the change in internal energy of 1 mole of an ideal gas when it is heated at constant volume from 300 K to 600 K?
