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Grade 11Physical Chemistry

For the reaction, N2(g) + 3H2(g) 2NH3(g). Heat of reaction at constant volume exceeds the heat of reaction at constant pressure by the value of xRT. The value of x is ________

Profile image of jagadeeshbabu
8 Years agoGrade 11
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1 Answer

Profile image of Gopal
8 Years ago
Heat of reaction at constant volume(ΔH) and the heat of reaction at constant pressure(ΔU)  are related as
ΔH-ΔU=ΔnRT
for the reaction change in number of moles of gaseous species
Δn= \sum number of moles of gaseous products – \sumnumber of moles of gaseous reactants
Δn= 2-4
Δn=-2
\therefore = -2