The decomposition of calcium carbonate proceeds according to CaCO _3( s ) CaO ( s ) +…

CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics

Problem

The decomposition of calcium carbonate proceeds according to

\text{CaCO}_3(\text{s}) \to \text{CaO}(\text{s}) + \text{CO}_2(\text{g})

\Delta H_{\text{rxn}} = +178\,\text{kJ}\,\text{mol}^{-1}

. How many grams of

\text{CaCO}_3

must decompose to absorb

1.07\times10^{3}\,\text{kJ}

of heat under constant-pressure conditions? (a)

1.8\times10^{3}\,\text{g}

(b)

3.4\times10^{2}\,\text{g}

(c)

6.0\times10^{2}\,\text{g}

(d)

1.8\times10^{1}\,\text{g}