JEE MAIN - Chemistry (2002 - No. 4)
A heat engine absorbs heat Q1 at temperature T1 and heat Q2 at temperature T2. Work done by the engine is J (Q1 + Q2). This data :
violates 1st law of thermodynamics
violates 1st law of thermodynamics if Q1 is +ve
violates 1st law of thermodynamics if Q1 is -ve
does not violates 1st law of thermodynamics
Explanation
According to first law of thermodynamics energy can neither be created nor destroyed although it can be converted from one form to another.
NOTE : Carnot cycle is based upon this principle but during the conversion of heat into work some mechanical energy is always converted to other form of energy hence this data violates $$1$$ st. law of thermodynamics.
NOTE : Carnot cycle is based upon this principle but during the conversion of heat into work some mechanical energy is always converted to other form of energy hence this data violates $$1$$ st. law of thermodynamics.
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