First slide

Relation between Delta H and Delta U

Question

For the reaction involving the complete combustion of isobutane, the correct relation is

Easy

A

$\large \Delta H=\Delta E\,$
B

$\Delta H>\Delta E$
C

$\Delta H=\Delta E=0$
D

$\Delta H<\Delta E$

Solution

$C_{4} H_{10} (g) + \frac{13}{2} O_{2} (g) \to 4 {CO}_{2} (g) + 5 H_{2} O (l); ∆ n_{g} = 4 - (1 + \frac{13}{2}) = - \frac{7}{2}; ∆ H < ∆ E;$

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