Care Must Be Taken When Dissolving Solid Pellets of Sodium

question 67

Multiple Choice

Care must be taken when dissolving solid pellets of sodium hydroxide (NaOH) in water as the temperature of the water can rise dramatically. Taking NaOH as the system, what can you deduce about the signs of the entropy change of the system (S_sys) and surroundings (S_surr) from this?

• A) "  S_sys" < 0 and "  S_surr" < 0
• B)"  S_sys" < 0 and "  S_surr" > 0
• C) "  S_sys" > 0 and "  S_surr" < 0
• D)"  S_sys" > 0 and "  S_surr" > 0
• E) Nothing can be deduced from this limited information.

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