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Cold Packs

Last updated almost 6 years ago

4 questions

1

Question 1

1.

The breaking of bonds on the molecular level always requires an input of energy. Therefore forming bonds always releases energy. Based on this, build an explanation for why a reaction would release heat (exothermic) and why a reaction would consume heat (endothermic).

1

1

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Question 2

2.

Energetics deal with:

A The strength of attractive and repulsive forces between the substances

B The number of ways that a substance can arrange itself and distribute energy

C Whether or not something dissolves in water

D Why salt dissolves in water

Question 3

3.

The main driving force that results in cold packs working is:

A The increase in the attractive forces between particles upon dissolving a solid

B The increase in the number of configurations available to the particles when a solid dissolves

C The decrease in the attractive forces between particles upon dissolving a solid

D The formation of a solid that occurs when the cold pack is cracked

Question 4

4.

Entropy is best described as:

A A measure of the strength of attractive forces between things

B A measure of how well something dissolves in water

C A measure of the number of ways that the particles that make up a substance can be arranged and distribute energy

D A measure of the weakness of attractive forces between things