3. Calculate the difference $C_{p,m} - C_{v,m}$ for (a) ethanol vapor and (b) liquid ethanol at 298 K. The density of liquid ethanol is 789 kg/m$^3$. Assume the ethanol vapor behaves as an ideal gas.
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Step 1: For an ideal gas, $C_{p,m} - C_{v,m} = R$, where R is the ideal gas constant. Show more…
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