Neutralization

Precipitation

Combustion

Fermentation

Standard enthalpy of formation

Standard enthalpy of combustion

Bond enthalpy

Standard enthalpy of neutralization

Positive

Negative

Zero

Temperature dependent

A substance that reduces another in a chemical reaction

A substance that absorbs energy when burned

A substance that releases energy upon combustion

A substance that contains no carbon

${\text{H}}_2\text{O}(l)\to {\text{H}}_2\text{O}(g)$

${\text{CO}}_2(g)\to {\text{CO}}_2(s)$

$\text{NaCl}(s)\to {\text{Na}}^{+}(aq)+{\text{Cl}}^{-}(aq)$

${\text{NH}}_4{\text{NO}}_3(s)\to {\text{NH}}_4^{+}(aq)+{\text{NO}}_3^{-}(aq)$