Enthalpy - Level 2 Chemistry

What is the symbol for enthalpy?

• Δe

• h

• ΔH

• ΔE

Which of the following is energy absorbing?

• condensation

• bond breaking

• bond forming

• bond resonance

Tags

NGSS.HS-PS1-4

The SI unit of enthalpy is the __________.

• calorie

• heat

• joule

• watt

ΔH value in an endothermic reaction is a positive number.

• True
• False

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

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

• solid
• liquid
• gas

Tags

NGSS.MS-PS1-4

What type of reaction is shown in the reaction pathway?

• endothermic reaction
• exothermic reaction

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

N₂ +  3H₂ −->  2NH₃ 
How many moles of ammonium are produced when 3 moles of nitrogen react with hydrogen?

• 6 moles Ammonium
• 1.5 moles ammonium
• 9 moles ammonium
• 9 moles hydrogen

Tags

NGSS.HS-PS1-7

Forming bonds...

• destroys energy

• releases energy.

• absorbs energy

• creates energy

Tags

NGSS.HS-PS1-4

Based upon the graph above, what type of reaction is this?

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

In the graph above, what does D represent?

• activation energy

• products

• reactants

• enthalpy change

Tags

NGSS.HS-PS1-4