d)Dr. Meyer described reactions like the one below as “meaningless”. Using your understanding of solvated ions, explain why this chemical equation does not represent a chemical reaction. /6
CHEM 111 Exam 2 Fall 2016 10. a) The molar heat capacity of liquid propane (C3H8) is 98.36 J mol-1K-1and the boiling point is -42oC. What is the internal energy change of liquid propane if a 50.0 g sample is heated from -100. oC. Assume the density of the liquid propane does not change over the temperature change. . 𝑘𝑘𝐽𝐽 4 points for math /8 b) Does the substance in part (a) have a higher or lower resistance to a change in temperature with an increase of thermal energy than water, which has a specific heat capacity of 4.18 J g-1K-1. Explain how you know. o C. /6 c) A sample of 20.0 g of the liquid propane in part (a) is allowed to evaporate and placed in a balloon containing 2.0 g of He. If the volume of the balloon with just the He is 15.2 L what is the final volume of the balloon.
CHEM 111 Exam 2 Fall 2016 /6
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