Thermochemistry and Reaction Rate Take Home Quiz

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 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

Heat flows from _______ to ______ objects

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

What does temperature measure?

• heat

• average kinetic energy

• space

• time

Durning a phase change the temperature of a substance_________.

• always increases
• always decreases
• always stays the same
• varies

Releasing heat into the surroundings occurs during an ___________________ reaction.

• Exothermic

• Endothermic

• Kinetic Energy

• Thermal Energy

Do reactants in an endothermic reaction have a higher or lower energy than the products? 

• Higher
• Lower

If ΔH is positive, heat would be shown on the _____ side of the thermochemical equation.

• Reactant
• Product