Topical Questions
These questions are keyed to the major topics in this chapter. Usually a question that is answered at the back of this book is paired with a similar one that is not.
Solid ammonium chloride is added to water in a beaker and dissolves. The beaker becomes cold to the touch.
(a) Make an appropriate choice of system and surroundings and describe it unambiguously.
(b) Explain why you chose the system and surroundings you did.
(c) Identify transfers of energy and material into and out of the system that would be important for you to monitor in your study.
(d) Is the process of dissolving NH4Cl(s) in water exothermic or endothermic?
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