Import Question JSON

Current Question (ID: 8270)

Question:

$\text{Given the following reaction:}$ $4\text{H}(g) \rightarrow 2\text{H}_2(g)$ $\text{The enthalpy change for the reaction is -869.6 kJ. The dissociation energy of the H-H bond is:}$

Options:

1. $-869.6 \text{ kJ}$
2. $+434.8 \text{ kJ}$
3. $+217.4 \text{ kJ}$
4. $-434.8 \text{ kJ}$

Solution:

$\text{Hint: The bond dissociation energy is an enthalpy change of a particular chemical process, namely homolytic bond cleavage.}$ $\text{Step 1:}$ $\text{Find the enthalpy of reverse reaction as follows:}$ $4\text{H}(g) \rightarrow 2\text{H}_2 (g); \Delta\text{H} = -869.6 \text{ kJ}$ $2\text{H}_2(g) \rightarrow 4\text{H} (g); \Delta\text{H} = 869.6 \text{ kJ}$ $\text{Step 2:}$ $\text{Find the bond dissociation energy for a one-mole substance as follows:}$ $\text{H}_2(g) \rightarrow 2\text{H} (g); \Delta\text{H} = \frac{869.6}{2} = 434.8 \text{ kJ}$ $\text{Hence, option second is the correct answer.}$

Import JSON File

Upload a JSON file containing LaTeX/MathJax formatted question, options, and solution.

Expected JSON Format:

{
  "question": "The mass of carbon present in 0.5 mole of $\\mathrm{K}_4[\\mathrm{Fe(CN)}_6]$ is:",
  "options": [
    {
      "id": 1,
      "text": "1.8 g"
    },
    {
      "id": 2,
      "text": "18 g"
    },
    {
      "id": 3,
      "text": "3.6 g"
    },
    {
      "id": 4,
      "text": "36 g"
    }
  ],
  "solution": "\\begin{align}\n&\\text{Hint: Mole concept}\\\\\n&1 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\text{ moles of carbon atom}\\\\\n&0.5 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\times 0.5 \\text{ mol} = 3 \\text{ mol}\\\\\n&1 \\text{ mol of carbon} = 12 \\text{ g}\\\\\n&3 \\text{ mol carbon} = 12 \\times 3 = 36 \\text{ g}\\\\\n&\\text{Hence, 36 g mass of carbon present in 0.5 mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6].\n\\end{align}",
  "correct_answer": 4
}