Acid spills are frequently neutralized using sodium carbonate or sodium hydrogen carbonate. The unbalanced equations that show the neutralization of benzoic acid are 

HCOOH(l) + Na₂CO₃(s) → NaHCOO(aq) + CO₂(g) + H₂O(l)

HCOOH(l) + NaHCO₃(s) → NaHCOO(aq) + CO₂(g) + H₂O(l)

Determine the amount of heat absorbed or released in kilojoules by the neutralization of 0.500 gallons of formic acid (density = 1.22 g/mL).

ΔH°_{f, NaHCOO(aq)} = −293.3 kJ/mol

ΔH°_{f, HCOOH(l)} = −425.0 kJ/mol

ΔH°_{f, Na2CO3} = −1130.7 kJ/mol

ΔH°_{f, NaHCO3} = −950.8 kJ/mol

ΔH°_{f, CO2(g)} = −393.5 kJ/mol

 ΔH°_{f, H2O(l)} = −285.8 kJ/mol