Predict the sign of entropy. Write P if it is positive and N for negative. • sugar dissolving in tea • air pumped into a tire • frost forms on a window pane • acetone evaporates from nail polish remover • decomposition of calcium carbonate • combustion of methane synthesis of nitrogen and hydrogen gas • nitrate reaction between sodium iodide and potassium • CaCO3(s) → CaO(s) + CO2(g) • N2(g)

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