Thermodynamics And Thermochemistry
- Thermodynamics And Thermochemistry Result Question 1
- Thermodynamics and Thermochemistry - Result Question 65
- Thermodynamics and Thermochemistry - Result Question 66
- Thermodynamics and Thermochemistry - Result Question 67
- Thermodynamics And Thermochemistry Result Question 2
- Thermodynamics And Thermochemistry Result Question 3
- Thermodynamics And Thermochemistry Result Question 4
- Thermodynamics And Thermochemistry Result Question 5
- Thermodynamics and Thermochemistry - Result Question 1
- Thermodynamics And Thermochemistry Result Question 6
- Thermodynamics And Thermochemistry Result Question 7
- Thermodynamics And Thermochemistry Result Question 8
- Thermodynamics And Thermochemistry Result Question 9
- Thermodynamics And Thermochemistry Result Question 10
- Thermodynamics and Thermochemistry - Result Question 2
- Thermodynamics And Thermochemistry Result Question 11
- Thermodynamics And Thermochemistry Result Question 12
- Thermodynamics And Thermochemistry Result Question 13
- Thermodynamics And Thermochemistry Result Question 14
- Thermodynamics And Thermochemistry Result Question 15
- Thermodynamics and Thermochemistry - Result Question 3
- Thermodynamics And Thermochemistry Result Question 16
- Thermodynamics And Thermochemistry Result Question 17
- Thermodynamics And Thermochemistry Result Question 18
- Thermodynamics And Thermochemistry Result Question 19
- Thermodynamics And Thermochemistry Result Question 20
- Thermodynamics and Thermochemistry - Result Question 4
- Thermodynamics And Thermochemistry Result Question 21
- Thermodynamics And Thermochemistry Result Question 22
- Thermodynamics And Thermochemistry Result Question 23
- Thermodynamics And Thermochemistry Result Question 24
- Thermodynamics And Thermochemistry Result Question 25
- Thermodynamics and Thermochemistry - Result Question 5
- Thermodynamics And Thermochemistry Result Question 26
- Thermodynamics And Thermochemistry Result Question 27
- Thermodynamics And Thermochemistry Result Question 28
- Thermodynamics And Thermochemistry Result Question 29
- Thermodynamics And Thermochemistry Result Question 30
- Thermodynamics and Thermochemistry - Result Question 6
- Thermodynamics And Thermochemistry Result Question 31
- Thermodynamics And Thermochemistry Result Question 32
- Thermodynamics And Thermochemistry Result Question 33
- Thermodynamics And Thermochemistry Result Question 34
- Thermodynamics and Thermochemistry - Result Question 7
- Thermodynamics and Thermochemistry - Result Question 8
- Thermodynamics and Thermochemistry - Result Question 9
- Thermodynamics and Thermochemistry - Result Question 10
- Thermodynamics and Thermochemistry - Result Question 11
- Thermodynamics and Thermochemistry - Result Question 12
- Thermodynamics and Thermochemistry - Result Question 13
- Thermodynamics and Thermochemistry - Result Question 14
- Thermodynamics and Thermochemistry - Result Question 15
- Thermodynamics and Thermochemistry - Result Question 16
- Thermodynamics and Thermochemistry - Result Question 17
- Thermodynamics and Thermochemistry - Result Question 18
- Thermodynamics and Thermochemistry - Result Question 19
- Thermodynamics and Thermochemistry - Result Question 20
- Thermodynamics and Thermochemistry - Result Question 21
- Thermodynamics and Thermochemistry - Result Question 22
- Thermodynamics and Thermochemistry - Result Question 23
- Thermodynamics and Thermochemistry - Result Question 24
- Thermodynamics and Thermochemistry - Result Question 25
- Thermodynamics and Thermochemistry - Result Question 26
- Thermodynamics and Thermochemistry - Result Question 27
- Thermodynamics and Thermochemistry - Result Question 28
- Thermodynamics and Thermochemistry - Result Question 29
- Thermodynamics and Thermochemistry - Result Question 30
- Thermodynamics and Thermochemistry - Result Question 31
- Thermodynamics and Thermochemistry - Result Question 32
- Thermodynamics and Thermochemistry - Result Question 33
- Thermodynamics and Thermochemistry - Result Question 34
- Thermodynamics and Thermochemistry - Result Question 35
- Thermodynamics and Thermochemistry - Result Question 36
- Thermodynamics and Thermochemistry - Result Question 37
- Thermodynamics and Thermochemistry - Result Question 38
- Thermodynamics and Thermochemistry - Result Question 39
- Thermodynamics and Thermochemistry - Result Question 40
- Thermodynamics and Thermochemistry - Result Question 41
- Thermodynamics and Thermochemistry - Result Question 42
- Thermodynamics and Thermochemistry - Result Question 43
- Thermodynamics and Thermochemistry - Result Question 44
- Thermodynamics and Thermochemistry - Result Question 45
- Thermodynamics and Thermochemistry - Result Question 46
- Thermodynamics and Thermochemistry - Result Question 47
- Thermodynamics and Thermochemistry - Result Question 48
- Thermodynamics and Thermochemistry - Result Question 49
- Thermodynamics and Thermochemistry - Result Question 50
- Thermodynamics and Thermochemistry - Result Question 51
- Thermodynamics and Thermochemistry - Result Question 52
- Thermodynamics and Thermochemistry - Result Question 53
- Thermodynamics and Thermochemistry - Result Question 54
- Thermodynamics and Thermochemistry - Result Question 55 — JEE PYQ Chapterwise
- Thermodynamics and Thermochemistry - Result Question 55 — JEE PYQ Chapterwise
- Thermodynamics and Thermochemistry - Result Question 55 — JEE PYQ Chapterwise
- Thermodynamics and Thermochemistry - Result Question 58 — JEE PYQ Chapterwise
- Thermodynamics and Thermochemistry - Result Question 58 — JEE PYQ Chapterwise
- Thermodynamics and Thermochemistry - Result Question 58 — JEE PYQ Chapterwise
- Thermodynamics and Thermochemistry - Result Question 61
- Thermodynamics and Thermochemistry - Result Question 62
- Thermodynamics and Thermochemistry - Result Question 63
- Thermodynamics and Thermochemistry - Result Question 64
- Thermodynamics and Thermochemistry - Result Question 68
- Thermodynamics and Thermochemistry - Result Question 69
- Thermodynamics and Thermochemistry - Result Question 70
- Thermodynamics and Thermochemistry - Result Question 71
- Thermodynamics and Thermochemistry - Result Question 72
- Thermodynamics and Thermochemistry - Result Question 58 — JEE PYQ Chapterwise
- Thermodynamics and Thermochemistry - Result Question 75
Thermodynamics And Thermochemistry Result Question 30
30. The molar heats of combustion of $\mathrm{C} _2 \mathrm{H} _2(g), \mathrm{C}$ (graphite) and $\mathrm{H} _2(\mathrm{~g})$ are $310.62$ $ \mathrm{kcal}, 94.05 $ $\mathrm{kcal}$ and $68.32 $ $\mathrm{kcal}$ respectively. Calculate the standard heat of formation of $\mathrm{C} _2 \mathrm{H} _2(g)$.
(1983, 2M)
Show Answer
Answer:
Correct Answer: 30. $(54.2 $ $\mathrm{kcal})$
Solution:
- The standard state formation reaction of $\mathrm{C}_2 \mathrm{H}_2(g)$ is :
$ 2 \mathrm{C}(\mathrm{g})+\mathrm{H}_2(g) \longrightarrow \mathrm{C}_2 \mathrm{H}_2(g) ; \quad \Delta H_f^{\circ} $
$\Delta H_r^{\circ}= \Sigma \Delta H_{\text {comb }}^{\circ} \text { (reactants) }-\Sigma \Delta H_{\text {comb }}^{\circ} \text { (products) } $
$= -2 \times 94.05-68.32-(-310.62) $
$= 54.2 \mathrm{kcal}=\Delta H_f^{\circ}\left(\mathrm{C}_2 \mathrm{H}_2\right)$
BETA
