Two moles of helium gas undergo a cyclic process as shown in Fig. Assuming the gas to be ideal, calculate the following quantities in this process (a) The net change in the heat energy (b) The net work done (c) The net change in internal energy

Two moles of helium gas undergo a cyclic process as shown in Fig. Assu

1.	Two moles of helium gas undergo a cyclic process as shown in Fig. Assuming the gas to be ideal, calculate the following quantities in this process (a) The net change in the heat energy (b) The net work done (c) The net change in internal energy
Answer» Correct Answer - A::B::C In a cyclic process, `DeltaU=0` `Q_(n et)=W_(n et)` `Q_(AB)=nC_pDeltaT` `=(2)(5/2R)(400-300)` `=500R` `Q_(BC)=nRT_(B)In(p_i/p_f)` `=(2)(R)(400)In(2/1)` `=800RIn(2)` `Q_(CD)=nC_pDeltaT` `=-500R` `Q_(DA)=nRT_DIn(p_i/p_f)` `=(2)(R)(300)In(1/2)` `=-600RIn(2)` `:.` `Q_(n et)=W_(n et)=(200R)In(2)` `=(200)(8.31)(0.693)` `~~1153J`

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Two moles of helium gas undergo a cyclic process as shown in Fig. Assuming the gas to be ideal, calculate the following quantities in this process (a) The net change in the heat energy (b) The net work done (c) The net change in internal energy

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