## A refrigerator is to maintain eatables kept inside at9oC . If room temperature is 36o C, calculate the coefficient of performance

A refrigerator is to maintain eatables kept inside at9oC . If room temperature is 36o C, calculate the coefficient of performance

## A thermodynamic system is taken from an original state to an intermediate state by the linear process shown in Fig. (12.13).

A thermodynamic system is taken from an original state to an intermediate state by the linear process shown in Fig. (12.13).

## An electric heater supplies heat to a system at a rate of 100W. If system performs work at a rate of 75 Joules per second. At what rate is the internal energy increasing?

An electric heater supplies heat to a system at a rate of 100W. If system performs work at a rate of 75 Joules per second. At what rate is the internal energy increasing?

## A steam engine delivers  5.4×108 J of work per minute and services  3.6 ×109 J of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per minute?

A steam engine delivers  5.4×108 J of work per minute and services  3.6 ×109 J of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per minute?

Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is   thermally insulated. The stopcock is suddenly opened. Answer Read More …

## In changing the state of a gas adiabatically from an equilibrium state A to another equilibrium ate B, an amount of work equal to 22.3 J is done on the system. If the gas is taken from state A to B via a process in which the net heat absorbed by the system is 9.35 cal, how much is the net work done by the system in the latter case? (Take 1 cal = 4.19 J)

In changing the state of a gas adiabatically from an equilibrium state A to another equilibrium ate B, an amount of work equal to 22.3 J is done on the system. If the gas is taken from state A to B via Read More …

## A cylinder with a movable piston contains 3 moles of hydrogen at standard temperature and pressure. The walls of the cylinder are made of a heat insulator, and the piston is insulated by having a pile of sand on it. By what factor does the pressure of the gas increase if the gas is compressed to half its original volume?

A cylinder with a movable piston contains 3 moles of hydrogen at standard temperature and pressure. The walls of the cylinder are made of a heat insulator, and the piston is insulated by having a pile of sand on it. By what Read More …

## Explain why (a) Two bodies at different temperatures 1 2 T and T if brought in thermal contact do not necessarily settle to the mean temperature (T1 +T2)/2 (b) The coolant in a chemical or a nuclear plant (i.e., the liquid used to prevent the different parts of a plant from getting too hot) should have high specific heat. (c) Air pressure in a car tyre increases during driving. (d) The climate of a harbour town is more temperate than that of a town in a desert at the same latitude.

Explain why (a) Two bodies at different temperatures  T1 and T2 if brought in thermal contact do not necessarily settle to the mean temperature (T1 +T2)/2 (b) The coolant in a chemical or a nuclear plant (i.e., the liquid used to Read More …

## What amount of heat must be supplied to  2.0× 10-2 kg of nitrogen (at room temperature) to raise its temperature by 45 oC at constant pressure? (Molecular mass of  N2 =28; R = 8.3 J mol-1K-1

What amount of heat must be supplied to  2.0× 10-2 kg of nitrogen (at room temperature) to raise its temperature by 45 oC at constant pressure? (Molecular mass of

## A geyser heats water flowing at the rate of 3.0 litres per minute from27oC to 77 oC . If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is  4.0 × 104 J / g ?

A geyser heats water flowing at the rate of 3.0 litres per minute from27oC to 77 oC . If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is  4.0 × Read More …