Question:medium

At $298\,K$, the value of $(\Delta H-\Delta U)$ for the combustion of 1 mole of \[ C_4H_{10}(g) \] is $x$ kJ and for the combustion of 1 mole of glucose, the value of \[ (\Delta H-\Delta U) \] is $y$ kJ. The value of $(x-y)$ (in kJ) is \[ (R=8.3\ \text{J K}^{-1}\text{mol}^{-1}) \]

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For chemical reactions involving gases: \[ \boxed{\Delta H-\Delta U=\Delta n_gRT} \] Only gaseous species are counted while calculating $\Delta n_g$. Solids and liquids are ignored.

Updated On: Jul 29, 2026

$+8.657$
$-8.657$
$-9.659$
$+4.329$

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The Correct Option is B

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At \(298\,K\), the value of \((\Delta H-\Delta U)\) for the combustion of 1 mole of \[ C_4H_{10}(g) \] is \(x\) kJ and for the combustion of 1 mole of glucose, the value of \[ (\Delta H-\Delta U) \] is \(y\) kJ. The value of \((x-y)\) (in kJ) is \[ (R=8.3\ \text{J K}^{-1}\text{mol}^{-1}) \]

Show Hint

The Correct Option is B

Solution and Explanation

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