The entropy decreases in this system.
Entropy is the measure of change in disorder of the system. The entropy increases with the increase in number of possible states of a system.
Entropy of a system depends upon the temperature. Burning of gasoline produces gases at high temperature, the disorder of the system increases. Therefore, the entropy increases due to the high temperature of the gases produced
Ore is the impure form of the metal; similarly, the gold ore contains gold metal along with the impurities. Hence, due to the impurities in the ore, there is high rate of disorder inthe ore. But the disorder decreases when the gold is separated from the ore as the gold contains lesser impurities than the ore. Therefore, the entropy decreases in this system.
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