The enthalpy change for chemical reaction is denoted aas `DeltaH^(Theta)` and `DeltaH^(Theta) = H_(P)^(Theta) - H_(R)^(Theta)`. The relation between enthalpy and internal enegry is expressed by equation: `DeltaH = DeltaU +DeltanRT` where `DeltaU =` change in internal enegry `Deltan =` change in number of moles, `R =` gas constant. Which of the following equations corresponds to the definition of enthalpy of formation at `298K`?A. `C("graphite") +2H_(2)(g) +(1)/(2)O_(2)(l) rarr CH_(3) OH(g)`B. `C("diamond") +2H_(2)(g)+(1)/(2)O_(2)(g) rarr CH_(3)OH(l)`C. `2C("graphite") +4H_(2)(g) +O_(2)(g) rarr 2CH_(3)OH(l)`D. `C("graphite") +2H_(2)(g) +(1)/(2)O_(2)(g) rarr CH_(3)OH(l)`

The enthalpy change for chemical reaction is denoted aas `DeltaH^(Thet

1.	The enthalpy change for chemical reaction is denoted aas `DeltaH^(Theta)` and `DeltaH^(Theta) = H_(P)^(Theta) - H_(R)^(Theta)`. The relation between enthalpy and internal enegry is expressed by equation: `DeltaH = DeltaU +DeltanRT` where `DeltaU =` change in internal enegry `Deltan =` change in number of moles, `R =` gas constant. Which of the following equations corresponds to the definition of enthalpy of formation at `298K`?A. `C("graphite") +2H_(2)(g) +(1)/(2)O_(2)(l) rarr CH_(3) OH(g)`B. `C("diamond") +2H_(2)(g)+(1)/(2)O_(2)(g) rarr CH_(3)OH(l)`C. `2C("graphite") +4H_(2)(g) +O_(2)(g) rarr 2CH_(3)OH(l)`D. `C("graphite") +2H_(2)(g) +(1)/(2)O_(2)(g) rarr CH_(3)OH(l)`
Answer» Graphite is a standard state of carbon and `CH_(3)OH` in liquid state is also standard state.

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