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Thermodynamics question

2012 · Shift 2 · Q10
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Thermodynamics question

2012 · Shift 2 · Q10

JEE AdvancedChemistryThermodynamicsMCQ+3 / −1
Using the data provided, calculate the multiple bond energy (kJ mol -1) of a C≡C bond in C2H2C_2H_2C2​H2​. That energy is (take the bond energy of C-H bond as 350 kJ mol -1). 2C(s)+H2(g)→C2H2ΔH=225 kJ mol−12C(s)→2C(g)ΔH=1410 kJ mol−1H2(g)→2H(g)ΔH=330 kJ mol−1\begin{array}{ll} 2\text{C}(s) + \text{H}_2(g) \to \text{C}_2\text{H}_2 & \Delta H = 225 \text{ kJ mol}^{-1} \\ 2\text{C}(s) \to 2\text{C}(g) & \Delta H = 1410 \text{ kJ mol}^{-1} \\ \text{H}_2(g) \to 2\text{H}(g) & \Delta H = 330 \text{ kJ mol}^{-1} \end{array}2C(s)+H2​(g)→C2​H2​2C(s)→2C(g)H2​(g)→2H(g)​ΔH=225 kJ mol−1ΔH=1410 kJ mol−1ΔH=330 kJ mol−1​
  1. A
    1165 kJ mol −-− 1
  2. B
    837 kJ mol −-− 1
  3. C
    865 kJ mol −-− 1
  4. D
    815 kJ mol −-− 1
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