Magnesium was reacted with acid to give a salt and hydrogen. The experiment was carried out once with dilute acid and then repeated with concentrated acid. Look at the
graph. Is graph 1 the reaction with the dilute or the concentrated acid?

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

is.gd/qKzpBU

"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 1 i believe