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How to Calculate the heat of formation of formaldehyde (HCHO) at 350 K. The standard generation heat is -119 kJ mol-1. The values of the heat capacity (Cp) for constant pressure: formaldehyde: 19.3 J mol-1K-1; hydrogen: 28.9 Jmol-1K-1; carbon: 4.2 J mol-1 K-1; oxygen: 26.4 J mol-1 K-1.

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