Combustion of gaseous propane,

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

Problem

\text{C}_3\text{H}_8

, releases thermal energy according to the equation

\text{C}_3\text{H}_8(g)+5\text{O}_2(g)\rightarrow3\text{CO}_2(g)+4\text{H}_2\text{O}(l)\;\;\;\Delta H=-2.22\times10^3\,\text{kJ}\text{ per mole of }\text{C}_3\text{H}_8

What amount of heat is released when

3.00\,\text{g}

of propane is burned completely under constant-pressure conditions? (a)

-2.22\times10^{2}\,\text{kJ}

(b)

+1.51\times10^{2}\,\text{kJ}

(c)

-1.51\times10^{2}\,\text{kJ}

(d)

-7.56\times10^{2}\,\text{kJ}