CHM 103 Spontaneous Reactions Quiz

Arrange the following items by relative entropy, from lowest entropy (1) to highest entropy (4).

1) 50 coins arranged in one vertical column by size and date. 2) 50 coins arrange in vertical stacks by denominations: penny, nickel, dime, quarter. 3) 50 coins arranged in loose piles by denominations: penny, nickel, dime, quarter. 4) Bag of 50 loose coins.

Arrange the following items by relative entropy, from lowest entropy (1) to highest entropy (4).

1) 50 g of solid butter at refrigerator temperature. 2) 50 g of melted butter in a warm sauce pan. 3) 50 g of bubbling hot butter in a hot sauce pan. 4) 50 g of butter all evaporated from a very hot sauce pan.

Arrange the following items by relative entropy, from lowest entropy (1) to highest entropy (4).

1) 50 leaves still on a tree 2) 25 leaves on a tree and 25 leaves at the base of the tree 3) 50 leaves at the base of the tree 4) 50 leaves scattered all over the yard by the wind.

If energy is gained during a chemical reaction, then the reaction is said to be...

Endergonic

If energy is lost during a chemical reaction, then the reaction is said to be...

Exergonic

A non-spontaneous reaction usually occur quickly by itself.

False

A reaction is non-spontaneous if the change in entropy is positive.

False

Under what conditions is a chemical process always spontaneous.

System is exergonic and the entropy is increasing.

A reaction is non-spontaneous if the energy change is energonic

True

A reaction is spontaneous if the change in entropy is positive.

True

A reaction is spontaneous if the energy change is exergonic.

True

A spontaneous reaction can occur slowly.

True

A non-spontaneous reaction occurs in a given set of conditions. These are:

With continual intervention

A spontaneous reaction occurs in a given set of conditions. These are:

With some intervention at the beginning