Equal masses of liquid water and liquid ethanol are each heated by

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Thermodynamics · Thermodynamics

Problem

Equal masses of liquid water and liquid ethanol are each heated by 10 ∘C10\,^{\circ}\text{C}. Specific heat capacities are cwater=4.18 J g−1 ∘C−1c_{\text{water}} = 4.18\,\text{J g}^{-1}\,^{\circ}\text{C}^{-1} and cethanol=2.44 J g−1 ∘C−1c_{\text{ethanol}} = 2.44\,\text{J g}^{-1}\,^{\circ}\text{C}^{-1}. Which statement is true about the magnitude of the heat qq absorbed by each liquid? (a) Both liquids absorb the same quantity of heat because their temperature increases are identical. (b) Ethanol absorbs more heat than water because its lower specific heat means it must take in more energy to reach the same ΔT\Delta T.},{ (c) Water absorbs more heat than ethanol because its specific heat capacity is higher. (d) Water absorbs less heat than ethanol because, for equal volumes, ethanol has a smaller density and therefore a smaller mass.

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