Thermochemistry

Is the combustion of gasoline endothermic or exothermic?

• Endothermic
• Exothermic

What is the symbol for heat?

• q
• H
• J
• ∘C

What are chemical reactions that absorb energy?

• endothermic

• fast

• slow

• exothermic

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

• energy

• chemistry

• work

• thermochemistry

What is the formula for calculating heat?

• q = mcΔT

• H = ΔH x moles

• H = ΔH x grams

• products - reactants

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

• exothermic because releasing energy

• exothermic because absorbing energy

• endothermic because absorbing energy

• endothermic because releasing energy

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

• calorie
• joule
• specific heat
• 4.184 J

Heat flows from _______ to ______ objects

• cooler to warmer
• warmer to warmer
• warmer to cooler
• cooler to cooler

A 500g piece of aluminum has a temperature of 7°C. What is the heat energy produced? Specific heat of Aluminum is 0.900 J/gºC.

• 3000 J

• 3000 g

• 3150 J

• 3150 g

What does temperature measure?

• heat

• average kinetic energy

• space

• time