Question
Question: The heat of transition for carbon from the following is C<sub>Diamond</sub> + O<sub>2</sub>(g) → C...
The heat of transition for carbon from the following is
CDiamond + O2(g) → CO2(g) ∆H = – 94.3 kcal
CAmorphous+ O2(g) → CO2(g) ∆H = – 97.6 kcal
A
3.3 kJ / mol
B
3.3 kcal / mol
C
–3.3 kJ / mol
D
– 3.3 kcal / mol
Answer
3.3 kcal / mol
Explanation
Solution
Given
CD + O2(g) → CO2(g)
∆H = –94.3 kcal …(1)
CA + O2(g) → CO2(g)
∆H = – 97.6 kcal …(2)
– – – +
Subtracting equation (2) from equation (1):
CD – CA → 0; ∆H = +3.3 kcal
CD → CA ∆H = +3.3 kcal