Thermodynamics ...

A diatomic gas does $$80\ J$$ of work when expanded isobarically. The heat given to the gas during this process is

The higher and lower fixed points on a thermometer are separated by $$ I80mm$$ . When the length of the thread above the lower temperature 90mm , the temperature reading would be

For a first order reaction rate constant is $$1 \times {10^{ - 5}}{\sec ^{ - 1}}$$ having $${E_a} = 1800\ kJ/mol$$ . Then the value of $$\ell nA$$ at$$T = 600\ K$$ is:-

$$0.1 \,{m^3}$$ of water at $${80^ \circ }$$ is mixed with $$0.3 {m^3}$$ of water at $${60^ \circ }$$. The final temperature of mixture is :

Air is filled in a tube of the wheel of a car at $$27^{\circ } C$$ and 2 atm pressure if the tube is suddenly bursts, the final temperature of air will be-
$$(\gamma =1.5, 2^{1/3}=1.251)$$

$$V = k \left(\dfrac{P}{T}\right)^{0.33}$$ where k is constant. It is an:

A box of negligible mass containing $$2$$ moles of an ideal gas of molar mass $$M$$ and adiabatic exponent $$\gamma$$ moves with constant speed $$v$$ on a smooth horizontal surface. If the box suddenly stops, then change in temperature of gas will be

The value closest to the thermal velocity of a Helium atom at room temperature (300 K) in $$ms^{-1}$$ is : [$$k_B = 1.4 \times 10^{-23} \ J/K ; \ m_{He} = 7\times 10^{-27} \ kg$$ ]

The thermal efficiency of a heat engine for which the work output is $$2500 J/cycle$$ and the heat input is $$10000 J/cycle$$, is:

A closed system undergoes a change of state by process $$1\rightarrow 2$$ for which $${Q}_{12}=10J$$ and $${W}_{12}=-5J$$. The system is now returned to its initial state by a different path $$2\rightarrow 1$$ for which $${Q}_{21}$$ is $$-3J$$. The work done by the gas in the process $$2\rightarrow 1$$ is: