Question

equal volume of C2 H2 and h2 are combusted under identical condition the ratio of their heat of combustion is
H2 (g) +1/2 O2(g)= H2O (g) ; delH=-241.8 kJ
C2H2 +2 1/2O2 (g) = 2CO2 (g) H2O (g); delH=-1300KJ

Answer 1

Answer:

ratio of heat of combustion is 5.37

Explanation:

Here we are given two chemical equations and value of of heat of combustion is also given.

First reaction is ;

C2H2 +212O2 →2CO2 + H2O  ΔH=−1300 kJ

Second reaction is;

H2+12O2 →H2O   ΔH=−241.8 kJ

Ratio = Heat of combustion of 1st reaction / heat of combustion of 2nd reaction

= −1300 kJ/−241.8 kJ

=5.376

Hence ratio of heat of combustion is 5.37