What will be the Delta U value, when one mole | vedclass

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(D) At constant volume, the change in internal energy $\Delta U$ is given by the formula: $\Delta U = n C_v \Delta T$. Given: Number of moles $n = 1 \

Vedclass · Accepted Answer

$1248$

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(D) At constant volume, the change in internal energy $\Delta U$ is given by the formula: $\Delta U = n C_v \Delta T$. Given: Number of moles $n = 1 \ mol$. Molar heat capacity $C_v = 20.8 \ J \ mol^{-1} \ K^{-1}$. Change in temperature $\Delta T = 40^{\circ} C - (-20^{\circ} C) = 60 \ K$. Substituting the values: $\Delta U = 1 \ mol 	imes 20.8 \ J \ mol^{-1} \ K^{-1} 	imes 60 \ K$. $\Delta U = 1248 \ J$.

What will be the $\Delta U$ value, when one mole of oxygen $(O_2)$ is heated from $-20^{\circ} C$ to $40^{\circ} C$ at constant volume (in $J$)? (Molar heat capacity for oxygen $\simeq 20.8 \ J \ mol^{-1} \ K^{-1}$)

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