Calcium carbide CaC2 can be made by heating calcium oxide li

Calcium carbide (CaC2) can be made by heating calcium oxide (lime) with carbon (charcoal). CaO(s) + 3C(s)- CaC2(s) + CO(g) AH = +464.8 kJ How many kilojoules of heat are absorbed in a reaction in which 323 kg C(s) is consumed?

Solution

The reaction is Cao(s)+3C -------->CaC2(s)+CO(g), deltaH= 464.8 Kj, since deltaH is +ve, heat is absorbed.

from the reaction, 3 moles of C required 464.8 Kj of heat

atomic weight of C= 12

3*12= 36 gm of C required 464.8 KJ

323*1000 gm of C requires 464.8*323*1000/36 KJ=4170289 Kj of heat