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For many purposes we can treat propane (C3H8) as an ideal gas at temperatures above its boiling point of 42C. Suppose the temperature of a sample of propane gas is lowered from 15.0C to 14.0C, and at the same time the pressure is increased by 5.0%, \begin{tabular}{|l|l|} \hline Does the volume of the sample increase, decrease, or stay the same? & increase \\ \hline & decrease \\ \hline \end{tabular}