NEET Chemistry Enthalpy MCQ Question
If 2 moles of carbon disulfide (CS2) are formed from graphite and sulfur, what is the total enthalpy change for the reaction C(graphite, s) + 2 S(l) → CS2(l) given that the standard enthalpy change, ∆rH⁰, for the reaction is +128.5 kJ mol⁻¹?
257.0 kJ
128.5 kJ
64.25 kJ
0 kJ
Correct Answer
Detailed Explanation
The standard enthalpy change, ∆rH⁰, for the formation of 1 mole of CS2 is +128.5 kJ. Therefore, for 2 moles, the enthalpy change is 2 × 128.5 kJ = 257.0 kJ.
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