Unit 9.1-3, 9.7 Review

measure of how dispersed the energy of a system is

• entropy

• enthalpy

• Gibb's free energy

energy required or released in a chemical or physical process

• entropy

• enthalpy

• Gibb's free energy

Tags

NGSS.HS-PS1-4

energy available in a system that can be used to do work

• entropy

• enthalpy

• Gibb's free energy

Tags

NGSS.HS-PS3-1

The third law of thermodynamics states that ___ of a perfect crystal at 0K is zero

• entropy

• enthalpy

• Gibb's free energy

• entropy increases

• entropy decreases

Answer explanation

1 mole = 2 moles

This also means that the opposite reaction, synthesis, where C+D=CD, has a decrease in entropy

Increase in temperature

• entropy increases

• entropy decreases

Answer explanation

so a decrease in temperature means that entropy decreases

gas expanding due to decrease in pressure or increase in volume

• entropy increases

• entropy decreases

Answer explanation

gas compressing due to increase in pressure or decrease in volume is a decrease in entropy

• entropy increases

• entropy decreases

Answer explanation

dissolution of a solid to its aqueous ions is an increase in entropy

a reaction that results in an increase in the number of moles

• entropy increases

• entropy decreases

Answer explanation

a reaction that results in a decrease in the number of moles is a decrease in entropy

• entropy increases

• entropy decreases

Answer explanation

the reverse, endothermic phase changes which takes solid to liquid to gas is an increase in entropy