Heat Q flows into a monatomic ideal gas, and the volume increases while the pres

Question

Heat Q flows into a monatomic ideal gas, and the volume increases while the pressure is kept constant. What fraction of the heat energy is used to do the expansion work of the gas? Express your answer using two significant figures. W/Q = Heat Q flows into a monatomic ideal gas, and the volume increases while the pressure is kept constant. What fraction of the heat energy is used to do the expansion work of the gas? Express your answer using two significant figures. W/Q = Heat Q flows into a monatomic ideal gas, and the volume increases while the pressure is kept constant. What fraction of the heat energy is used to do the expansion work of the gas? Express your answer using two significant figures. W/Q = What fraction of the heat energy is used to do the expansion work of the gas? Express your answer using two significant figures. W/Q = W/Q = W/Q =

Explanation / Answer

Let heat given = Q

Work done = W

For isobaric process:

Q = nCp*delta T

W = nR*delta T

Cp = 5/2 *R for monoatomic gas

=> W/Q = (nR*delta T) / ((5/2)nR*delta T)

=> W/Q = 2/5 = 0.40

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