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Here, in which case can the calculated s...

Here, in which case can the calculated standard reaction enthaply `(Delta_(1) H^(@))` be identified as the standard molar enthalpy of formation for methanol `(Delta_(g) H_(CH_(3) OH^(2)))`?

A

`CH_(4) (g) + (1)/(2) O_(2) (g) rarr CH_(3) OH (g)`

B

`C_("diamond") + (1)/(2) O_(2) (g) rarr 2 H_(2) (g) + CH_(3) OH (l)`

C

`CO (g) + 2 H_(2) (g) rarr CH_(3) OH (l)`

D

`C_("graphite") + (1)/(2) O_(2) rarr 2H_(2) (g) + CH_(3) OH(l)`

Text Solution

Verified by Experts

The correct Answer is:
D
The standard enthalpy of formation of a substance, denoted by `Delta_(f) H^(@)`, the the enthaply change for the formation of one mole of the substance in its standard state from its constiuent elements in their standard states. Thus, `Delta_(f) H^(@)` refers to specific reaction.
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