When $3 \ mol$ of $Ar_{(g)}$ is supplied with $229 \ J$ of heat at constant pressure,the temperature of the sample increases by $2.55 \ K$. Calculate the molar heat capacity of the gas at constant volume.
- A$21.7 \ J \ K^{-1} \ mol^{-1}$
- B$30.7 \ J \ K^{-1} \ mol^{-1}$
- C$14.7 \ J \ K^{-1} \ mol^{-1}$
- D$16.7 \ J \ K^{-1} \ mol^{-1}$
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View SolutionMatch the transformations in column $I$ with appropriate options in column $II$.
Column $I$ Column $II$ $A$. $CO_{2(s)} \rightarrow CO_{2(g)}$ $p$. phase transition $B$. $CaCO_{3(s)} \rightarrow CaO_{(s)} + CO_{2(g)}$ $q$. allotropic change $C$. $2H_{(g)} \rightarrow H_{2(g)}$ $r$. $\Delta H$ is positive $D$. $P_{(\text{white, solid})} \rightarrow P_{(\text{red, solid})}$ $s$. $\Delta S$ is positive $t$. $\Delta S$ is negative
| Column $I$ | Column $II$ |
| $A$. $CO_{2(s)} \rightarrow CO_{2(g)}$ | $p$. phase transition |
| $B$. $CaCO_{3(s)} \rightarrow CaO_{(s)} + CO_{2(g)}$ | $q$. allotropic change |
| $C$. $2H_{(g)} \rightarrow H_{2(g)}$ | $r$. $\Delta H$ is positive |
| $D$. $P_{(\text{white, solid})} \rightarrow P_{(\text{red, solid})}$ | $s$. $\Delta S$ is positive |
| $t$. $\Delta S$ is negative |
DifficultIIT 2011
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