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Clicker Question The following chemical reaction is exothermic: A2 + B2  2AB. This means: more stable higher average bond energies a) Reactants Reactants b) Reactants Products c) Products Products d) Products Reactants e) I do not know.

Clicker Question Consider the process: H2O(g)  H2O(l). Are Ssurr and S thermodynamically favorable or unfavorable? Ssurr S a) favorable favorable b) favorable unfavorable c) unfavorable favorable d) unfavorable unfavorable e) I do not know.

A Question to Consider You have your freezer set at ‒15C. You open the freezer, grab some ice, and place it on your kitchen counter (your house thermostat is set at 25C). You get distracted and let the ice sit on the counter all day. What happens to the ice? How can you use thermodynamic principles to prove this will happen?  

A Question to Consider Calculate Suniv when you take 1 mole of ice at ‒15C. and let it sit in a room at 25C, 1 atm. Hfusion for ice is 6.02 kJ/mol at 0C, 1 atm Cp for water is 75.3 J/Kmol Cp for ice is 37.5 J/Kmol Assume Cp is constant over the temperature range in question.