Thermodynamics Chemistry

If the reactant particles collide with less than the activation energy, the particles will be rebound, and no reaction will occur.

• True
• False

Temperature is a measure of the...

• total energy in a substance
• total kinetic energy in a substance
• average potential energy in a substance
• average kinetic energy of molecules in a substance

Tags

NGSS.HS-PS3-2

A substance with a high specific heat:

• Is always extremely hot.
• Requires a lot of energy to become hot.
• Is not heavy.
• Does not requires a lot of energy to become hot.

Tags

NGSS.HS-PS3-4

The first law of thermodynamics states that energy is

• created
• destroyed
• conserved
• created and destroyed

Tags

NGSS.HS-PS3-2

What is the activation energy?

• The energy of the products
• The energy of the reactants
• The minimum energy needed by the reactants to form the products.
• The energy lost in the reaction

Which letter corresponds to the energy of the products?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Which letter corresponds to the activation energy of the forward reaction?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4

In an endothermic reaction the system is releasing energy.

• True
• False

Tags

NGSS.HS-PS1-4

Refer the the following question:
2N₂ + 3H₂ --> 2NH₃ + 46 kJ
How much energy would be produced if only 1 mol of nitrogen was reacted?

• 92 kJ
• 0.143 kJ
• 23 kJ
• 15 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

This reaction is most likely

• endothermic.

• exothermic.

Tags

NGSS.HS-PS1-4