If a system undergoes contraction of volume then the work done by the system will be
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(c) $\Delta W = P\Delta V;$ here $\Delta V$ is negative so $\Delta W$ will be negative
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$Assertion :$ The heat supplied to a system is always equal to the increase in its internal energy.
$Reason :$ When a system changes from one thermal equilibrium to another, some heat is absorbed by it.
The work of $146\ kJ$ is performed in order to compress one kilo mole of gas adiabatically and in this process the temperature of the gas increases by $7^o C$. The gas is $(R=8.3\ J\ mol^{-1} K^{-1})$
A Carnot engine works first between $200^{\circ} C$ and $0^{\circ} C$ and then between $0^{\circ} C$ and $-200^{\circ} C$. The ratio of its efficiency in the two cases is
In a thermodynamic process pressure of a fixed mass of a gas is changed in such a manner that the gas releases $30$ joules of heat and $10$ joules of work was done on the gas. If the initial internal energy of the gas was $30$ joules, then the final internal energy will be ........ $J$
If heat is added at constant volume, $6300\,\,J$ of heat are required to raise the temperature of an ideal gas by $150\,\,K$. If instead, heat is added at constant pressure, $8800$ joules are required for the same temperature change. When the temperature of the gas changes by $300\,\,K$, the internal energy of the gas changes by ..... $J$
One mole of a monatomic ideal gas undergoes an adiabatic expansion in which its volume becomes eight times its initial value. If the initial temperature of the gas is $100 K$ and the universal gas constant $R =8.0 Jmol ^{-1} K ^{-1}$, the decrease in its internal energy, in Joule, is. . . . .