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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