B
beastly115
H2O(g) → H2O(l) ∆H (kJ/mole) = 44
C(s) + O2(g) → CO2(g) 394
H2(g) + 1/2O2(g) → H2O(l) 286
C2H5OH(l)+ 3O2(g) → 2CO2(g) + 3H2O(l) 1367
Calculate the enthalpy change for the reaction:
2C(s) + 2H2(g) + H2O(l) → C2H5OH(l)
A. 226 kJ/mole
B. +7 kJ/mole
C. +109 kJ/mole
D. +344 kJ/mole
E. +687 kJ/mole
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The answer is B, but in the answer the first rxn where H2O(g) goes to H2O(l) is not involved in the calculation to arrive at choice B. Why not?
Thanks.
C(s) + O2(g) → CO2(g) 394
H2(g) + 1/2O2(g) → H2O(l) 286
C2H5OH(l)+ 3O2(g) → 2CO2(g) + 3H2O(l) 1367
Calculate the enthalpy change for the reaction:
2C(s) + 2H2(g) + H2O(l) → C2H5OH(l)
A. 226 kJ/mole
B. +7 kJ/mole
C. +109 kJ/mole
D. +344 kJ/mole
E. +687 kJ/mole
-------------------------------
The answer is B, but in the answer the first rxn where H2O(g) goes to H2O(l) is not involved in the calculation to arrive at choice B. Why not?
Thanks.