Unit 9 Test Review: Thermodynamics, Equilibrium

The rate of a chemical reaction is NOT affected by which of the following:

• temperature
• concentration
• particle size (surface area)
• All of these affect reaction rates

Tags

NGSS.HS-PS1-5

What type of reaction is this?

• Endothermic
• Exothermic

Tags

NGSS.HS-PS1-4

ΔH value in an endothermic reaction is a positive number.

• True
• False

Tags

NGSS.HS-PS1-4

What type of reaction is shown in the reaction pathway?

• endothermic reaction
• exothermic reaction

Tags

NGSS.HS-PS1-4

The entropy will usually increase when

• a molecule is broken into two or more smaller molecules

• a reaction occurs that results in an increase in the number of moles of gas

• a solid changes to a liquid

• all of these

Identify whether the following result in an increase or decrease in entropy:

Gas --> Liquid --> solid

• increase

• decrease

What phase of matter has the most entropy?

• solid

• liquid

• gas

Tags

NGSS.HS-PS3-4

ΔS will be positive for the reaction

• 2H2 (g) + O2 (g) -> 2H2O (g)

• 2NO2 (g) -> N2O4 (g)

• BaF2 (s) ->Ba2+ (aq) + 2F- (aq)

• 2Hg (l) + O2 (g) ->2HgO (s)

Tags

NGSS.HS-PS1-4

Total energy of an isolated system is constant; energy can be transformed from one form to another

• Zeroth Law of Thermodynamics

• First Law of Thermodynamics

• Second Law of Thermodynamics

• Law of Conservation of Energy

The second law of thermodynamics states that entropy of a system tends to ______________.

• increase

• decrease

• stay constant

• fluctuate wildly

Tags

NGSS.HS-PS3-4