SATHEE: Chemical Thermodynamics Question 415

Chemical Thermodynamics Question 415

Question: The free energy change for the following reactions are given below, $C_{2} H_{2} (g) + \frac{5}{2} O_{2} (g) \to$

$2 C O_{2} (g) + H_{2} O (l); Δ G^{\circ} = - 1234 k J$

$C (s) + O_{2} (g) \to C O_{2} (g); Δ G^{\circ} = - 394 k J$

$H_{2} (g) + \frac{1}{2} O_{2} (g) \to H_{2} O (l); Δ G^{^{\circ}} = - 237 k J$ What is the standard free energy change for the reaction $H_{2} (g) + 2 C (s) \overset{}{\to} C_{2} H_{2} (g)$

Options:

A) $- 209, k J$

B) $- 2259, k J$

C) $+ 2259, k J$

D) $209, k J$

Show Answer

Answer:

Correct Answer: D

Solution:

By $2 \times$ (ii) - (i) + (iii) $H_{2} (g) + 2 C (s) \to C_{2} H_{2} (g), Δ G^{^{\circ}} = 209 k J$

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Chemical Thermodynamics Question 415

Question: The free energy change for the following reactions are given below, C2H2(g)+52O2(g)→

Options:

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Question: The free energy change for the following reactions are given below, $C_{2} H_{2} (g) + \frac{5}{2} O_{2} (g) \to$