Is my answer correct? refer to the phase diagram of substance x. which statement below is not true about the diagram? a. substance x is in the solid phase in the area shown by “1”. b. substance x exists as a solid, a liquid and a gas at point d. “ c. substance x is undergoing a change from a liquid to a gas at the line shown by e. * this is my answer* d. substance x is a liquid in the area shown by "2".

Yes you are right as from the phase diagram it can be seen :

A. Substance X is in the solid phase in the area shown by “1”.

B. Substance X exists as a solid, a liquid and a gas at point D.

D. Substance X is a liquid in the area shown by "2"

But the point C is not correct as Substance X is not undergoing a change from a liquid to a gas at the line shown by E while it undergoes a phase change from solid to gas.

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

the answer is d. 74.02