At constant `T`and`P`,Which of the following statements is correct for the reaction,
`CO(G)+(1)/(2)O_(2)(g)rarrCO_(2)(g)`,

Options

A. `Delta H = Delta E`
B. `Delta H lt Delta E`
C. `Delta H gt Delta E`
D. `Delta H` is independent of physical state of reactant

Answer

B

Explanation

As we know, `Delta H = Delta E + Delta n RT`
where, `Delta n` = gaseous product moles – gaseous reactant moles
For the reaction,
`CO(g) +(1)/(2)O_(2)(g) rarr CO_(2)(g)`
`Delta n=1-(1+(1)/(2))=-(1)/(2)`
`therefore Delta H = Delta E -(1)/(2) RT`
Hence, `Delta H lt Delta E`