ThermochemistryHard

Question

The reaction of zinc metal with hydrochloric acid was used to produce 1.5 moles of hydrogen gas at 298 K and 1 atm pressure. The magnitude of work done in pushing back the atmosphere is

Options

A.596 cal
B.894 cal
C.447 cal
D.298 cal

Solution

$w = - P.V_{H_{2}} = - nRT = - 1.5 \times 2 \times 298 = - 894\text{ cal}$

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