Thermodynamics

On celcius scale the temperature of body increases by $40^{\circ} \mathrm{C}$. The increase in temperature on Fahrenheit scale is:

A source supplies heat to a system at the rate of 1000 W . If the system performs work at a rate of 200 W . The rate at which internal energy of the system increases

A hypothetical gas expands adiabatically such that its volume changes from 08 litres to 27 litres. If the ratio of final pressure of the gas to initial pressure of the gas is $\frac{16}{81}$. Then the ratio of…

The compressibility of water is $4 \times 10^{-5}$ per unit atmospheric pressure. The decrease in volume of $100 \mathrm{~cm}^{3}$ of water under a pressure of 100 atmosphere will be

An ideal gas at atmospheric pressure is adiabatically compressed so that its density becomes 32 times of its initial value. If the final pressure of gas is 128 atmospheres, the value of ' $\gamma$ ' of the gas is :

In an adiabatic process, the pressure is increased by $\frac{2}{3} \% .$ If $\gamma=\frac{3}{2},$ then the volume decreases by nearly

An ideal monoatomic gas at $300 K$ expands adiabatically to twice its volume. The final temperature of gas is

A reservoir is at $827°C$ and Carnot's engine takes a thousand $\text{kilo} \text{calorie}$ of heat from it and exhausts it to a sink at $27°C$. What is the amount of work and the efficiency of the engine?

A vessel of volume 20L contains a mixture of hydrogen and helium at temperature of $27^{\circ} \mathrm{C}$ and pressure 2 atm. The mass of mixture is $5 \mathrm{~g}$. Assuming the gases to be ideal, the ratio of mass of…

Two balloons are filled one with pure he gas and other with air respectively. If the pressure and temperature of these balloons are same, then the number of molecules per unit volume is

In a thermodynamic process, the pressure of a fixed mass of a gas is changed in such a manner that the gas releases $20 \mathrm{~J}$ of heat and $8 \mathrm{~J}$ of work is done on the gas. If the initial internal energy…

One mole of $\mathrm{O}_{2}$ gas having a volume equal to 22.4 Litres at $0^{\circ} \mathrm{C}$ and 1 atmospheric pressure in compressed isothermally so that its volume reduces to 11.2 litres. The work done in this…