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# Calculating Gibbs Free Energy under Nonstandard Pressure

CHEM-SPY7WB

Use the data below to calculate the Gibbs free energy for the following reaction,

$$CaO(s) + 2NH_{4}Cl(s) \rightarrow NH_{3} + H_{2}O(g) + CaCl_{2}(s),$$

run at a temperature of $25^{\circ}$ and a pressure of $0.10 \space atm$ for $H_{2}O$ and $NH_{3}$?

Substance Formula $\Delta H_{f}^{\circ}\space kJ/mol$ $\Delta G_{f}^{\circ}\space kJ/mol$
$CaO(s)$ $-635.09$ $-603.42$
$NH_{4}Cl(s)$ $299.66$ $-203.08$
$NH_{3}(g)$ $-45.9$ $-16.37$
$H_{2}O(g)$ $-241.83$ $-228.59$
$CaCl_{2}(s)$ $-795.8$ $-748.1$
A

$-16.96$

B

$-11.26$

C

$01.5$

D

$17.3$