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Chem 162 Exam 3 Questions & Answers
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Chem 162 Exam 3 Questions & Answers
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Chem 162 Exam 3 Questions & AnswersThermodynamics - ANSWER-the study of energy transformations
thermochemistry - ANSWER-applied field to chemical reactions
energy - ANSWER-the ability to do work or transfer heat
work - ANSWER-energy used to cause an object that has mass to move
heat - ANSWER-energy used to cause the temperature of an object to change
enthalpy - ANSWER-the heat energy absorbed or released by a system during a constant-pressure
process deltaH
entropy - ANSWER-A measure of the dispersion of energy or randomness in a system
Enthalpy (H or q) - ANSWER-a thermodynamic quantity equivalent to the heat content of a system (when
pressure is constant).
when heat is absorbed by the system from the surrounding, process is endothermic (+)
when heat is released by the system into the surroundings, the process is exothermic (-)
Entropy (S) - ANSWER-a thermodynamic function that increases as the number of energetically
equivalent ways of arranging the components increases
spontaneous processes - ANSWER-proceed without any outside assistance (these processes are
irreversible)
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