04. Heat Energy

The heat content of a system at constant pressure is called

• entropy
• enthalpy
• heat
• energy

The randomness or disorder of a system

• heat (q)
• enthalpy (H)
• entropy (S)
• temperature (T)

The heat required to raise the temperature of a SUBSTANCE by 1∘C

• calorie
• joule
• specific heat
• 4.184 J

The heat required to raise the temperature of WATER 1∘C

• calorie
• joule
• specific heat
• energy

Tags

NGSS.HS-PS3-4

Chemical reactions that absorb energy are called

• endothermic
• fast
• slow
• exothermic

Tags

NGSS.HS-PS1-4

Formula for solving specific heat problems

• q = mcΔT
• H = ΔH x moles
• H = ΔH x grams
• products - reactants

Tags

NGSS.HS-PS3-4

Formula for solving phase change problems

• q = mcΔT
• H = ΔH x moles
• H = ΔH x change in temperature
• products - reactants

The following graph shows a(n)

• endothermic reaction
• exothermic reaction
• increase in entropy
• decrease in entropy

Tags

NGSS.HS-PS1-4

An endothermic reaction feels _____ to the touch

• warm
• cool

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

What type of reaction is shown?

• reactants
• endothermic
• exothermic
• products

Tags

NGSS.HS-PS1-4