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mechanical engineering thermodynamics
1. A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is
(A): +60 kJ
(B): -140 kJ
(C): -40 kJ
(D): -80 kJ
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