If the door of a refrigerator is kept open, then which of the following is true
Room is cooled
Room is heated
Room is either cooled or heated
Room is neither cooled nor heated
One mole of an ideal gas having initial volume $V$ , pressure $2P$ and temperature $T$ undergoes a cyclic process $ABCDA$ as shown below The net work done in the complete cycle is
Two rigid boxes containing different ideal gases are placed on a table. Box $A$ contains one mole of nitrogen at temperature $T_0$, while box $B$ contains one mole of helium at temperature $\left( {\frac{7}{3}} \right){T_0}$. The boxes are then put into thermal contact with each other, and heat flows between them until the gases reach a common final temperature (ignore the heat capacity of boxes). Then, the final temperature of the gases, $T_f$ in terms of $T_0$ is
A cyclic process $ABCD$ is shown in the given $P-V$ diagram. In the following answer, the one that represents the same process as in $P-T$ diagram is
An ieal heat engine operates on Carnot cycle between $227\,^oC$ and $127\,^oC$. It absorbs $6 \times 10^4\, cal$ at the higher temperature. The amount of heat converted into work equals to
The $P-V$ diagram of $2\,g$ of helium gas for a certain process $A\to B$ is shown in the figure. What is the heat given to the gas during the process $A \to B$?