Q. 114.2( 49 Votes )

Enthalpy of combu

Answer :

Given: Enthalpy of combustion of carbon (ΔH) = –393.5 kJ mol–1.

Mass of CO2 = 35.2g

Molar mass of CO2 = 12 + 2× 16

= 44 g/mol

1 mol of carbon = 44g

Heat released when 44g CO2 is formed = 393.5 kJ

Heat released when 35.2g CO2 is formed = × 35.2g

314.8 kJ

Thus, heat released when 35.2g CO2 formed is 314.8 kJ

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