Asked by Josie

1. What mass of carbon is required to produce 100kj of heat, when burned in air? Enthalpy change = -392kj.

2. What mass of methanol is required to produce 1000kj of heat, when burned in air?
Answered by DrBob222
C + O2 ==> CO2
392 kJ/mol x ? mol = 100 kJ
Then ?mol = grams/molar mass. You know mol and you know molar mass; solve for grams.
Answered by Josie
Got it - thank you.
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