Crystallization of sodium acetate occurs spontaneously from a supersaturated solution. What can you deduce about the signs of ΔS and ΔH for this process?

ΔS < 0

ΔH < 0

Explanation:

Recall that the process is crystallization. Crystallization involves conversion of aqueous ions back to solid. This process decreases the entropy of the system hence ΔS is negative.

But remember that a process is only spontaneous when ΔG <0 (negative). From;

ΔG = ΔH - TΔS

If  ΔS is negative, then (-TΔS) must be positive since  ΔS is negative. The only way to make the process spontaneous is to make ΔH negative so that ΔG also becomes negative.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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