For the given heat of reaction, (i)C(s)+O2(g)=CO2(g)+97 kcal (ii)CO2(g)+C(s)=2CO(g)-39 kcal the heat of combustion of CO(g) is:

Question

For the given heat of reaction, (i)C(s)+O2(g)=CO2(g)+97 kcal (ii)CO2(g)+C(s)=2CO(g)-39 kcal the heat of combustion of CO(g) is: (A) 68 kcal (B) -68 kcal (C) +48 kcal (D) None

Tardigrade Admin · Accepted Answer

Subtracting equation (ii) from equation (i), we get <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/8deb4a32acd319922e33af21c97738bc-.png" />

Q. For the given heat of reaction,
$(i) C (s) + O_{2} (g) = C O_{2} (g) + 97 k c a l$
$(ii) C O_{2} (g) + C (s) = 2 CO (g) - 39 k c a l$
the heat of combustion of $CO (g)$ is:

$68 k c a l$

$- 68 k c a l$

$+ 48 k c a l$

None

Subtracting equation (ii) from equation (i), we get

Q. For the given heat of reaction, (i)C(s)+O2​(g)=CO2​(g)+97kcal (ii)CO2​(g)+C(s)=2CO(g)−39kcal the heat of combustion of CO(g) is:

68kcal

−68kcal