AP Chemistry Spontaneity Entropy and Free Energy

Temperature is a measure of average [blank] energy of individual atoms.

• heat
• potential
• mechanical
• kinetic

Tags

NGSS.HS-PS3-2

ΔH value in an endothermic reaction is a positive number.

• True
• False

Tags

NGSS.HS-PS3-1

Which phase of matter has the greatest motion and least orderly arrangement?

• solid
• liquid
• gas

Tags

NGSS.HS-PS3-2

A catalyst works by

• changing the order of the reaction
• increasing the temperature
• lowering the activation energy
• making the activated complex

What type of reaction is shown in the reaction pathway?

• endothermic reaction
• exothermic reaction

Tags

NGSS.HS-PS1-4

 _?_  is the amount of energy required to raise the temperature of 1 gram of any substance 1^oC.

• Specific heat
• A calorie
• Thermal energy
• Conduction

The diagram represents which type of reaction

• endothermic
• exothermic

Tags

NGSS.HS-PS1-4

How do you calculate enthalpy change of a reaction?

• ΔH = ΔH_products - ΔH_reactants

• ΔT = q / mC

• ΔG = ΔH -TΔS

• E = mc²

Tags

NGSS.HS-PS1-4

Define 'Enthalpy'

• a) Energy stored in the movement of molecules in a substance
• b) The opposite of temperature
• c) The temperature of a molecule
• d) Energy stored in the chemical bonds in a substance

Tags

NGSS.HS-PS1-4

Heat is measured in 

• joules
• grams
• degrees celcius