GATE ME 1999 | First Law of Thermodynamics Question 28 | Thermodynamics

GATE ME 1999

MCQ (Single Correct Answer)

-0.3

A steel ball of mass $$1$$ $$kg$$ and specific heat $$0.4$$ $$kJ/kg$$ is at temperature of $${60^ \circ }C.$$ It is dropped into $$1$$ $$kg$$ water at $${20^ \circ }C.$$ The final steady state temperature of water is

$${23.5^ \circ }C.$$

$${30^ \circ }C.$$

$${35^ \circ }C.$$

$${40^ \circ }C.$$

GATE ME 1993

MCQ (Single Correct Answer)

-0.3

The first law of thermodynamics takes the form $$W = - \Delta \,H$$ when applied to :

A closed system undergoing a reversible adiabatic process.

An open system undergoing an adiabatic process with negligible changes in kinetic and potential energies.

A closed system undergoing a reversible constant volume process.

A closed system undergoing a reversible constant pressure process.

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