A sample of an ideal gas is taken through the cyclic process abca shown in Fig. 21-33. The scale...

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A sample of an ideal gas is taken through the cyclic process abca shown in Fig. 21-33. The scale of the vertical axis is set by \( p_{b}=7.5 \mathrm{kPa} \) and \( p_{a c}=2.5 \mathrm{kPa} \). At point \( a, T=280 \mathrm{~K} . \quad \) How many moles of gas are in the sam- ple? What are, the temple? What are, the tem- perature of the gas at point \( b \), the temperature of the gas at point \( c \), and the net work done by the gas during the cycle, and \ the net energy added to the gas as heat during the cycle?
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