Thermochemistry Practice

Is the combustion of gasoline endothermic or exothermic?

• Endothermic
• Exothermic

Tags

NGSS.HS-PS1-4

What is the symbol for heat?

• q
• H
• J
• ∘C

Tags

NGSS.HS-PS3-4

What are chemical reactions that absorb energy?

• endothermic

• fast

• slow

• exothermic

Tags

NGSS.HS-PS1-4

What is the study of heat changes that accompany chemical reactions and phase changes?

• energy

• chemistry

• work

• thermochemistry

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

What is the formula for calculating heat?

• q = mcΔT

• H = ΔH x moles

• H = ΔH x grams

• products - reactants

Convert 42 kJ into joules

• 0.042 J

• 175.73 J

• 42000 J

• 10.04 J

What are the two main types of energy?

• endothermic and exothermic

• spontaneous and nonspontaneous

• potential and kinetic

• entropy and enthalpy

Consider the reaction: 2 H₂O + energy --> 2H₂ + O₂

• exothermic because releasing energy

• exothermic because absorbing energy

• endothermic because absorbing energy

• endothermic because releasing energy

Tags

NGSS.HS-PS1-4

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

• calorie
• joule
• specific heat
• 4.184 J

Tags

NGSS.HS-PS3-4

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

• calorie
• joule
• specific heat
• energy