Q35 · CSIR-NET Chemistry, December 2012
Paper: CSIR-NET December 2012 · Subject: Physical Chemistry · Chapter: Thermodynamics · Topic: Thermodynamics – General · Marks: 2 · Difficulty: Medium
A carnot takes up 90 J of heat from the source kept at 300K. The correct statement among the following is
(a)It transfers 60 J of heat to the sink at 200 K
(b)It transfers 50 J of heat to the sink at 200 K
(c)It transfers 60 J of heat to the sink at 250 K
(d)It transfers 50 J of heat to the sink at 250 K
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
For a Carnot engine q_c/q_h = T_c/T_h: at T_c = 200 K, q_c = 90 × 200/300 = 60 J. At 250 K it would be 75 J, which no option lists.
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