Endo and Exo Check-In

Which statement is true?

• The total amount of energy in the universe is constant.

• Energy cannot be created or destroyed.

• If energy is lost by the system, an equal amount is gained by the surroundings.

• All of these are true.

An endothermic process is one in which:

• Heat is converted into mechanical work.

• Heat is converted into electricity.

• Heat is absorbed.

• Heat is lost.

A chemical reaction in which heat is released by the system into the surroundings is called

• endothermic

• exothermic

If a chemical reaction is EXOTHERMIC, the temperature would....

• Stay the same

• Increase

• Decrease

Is the combustion of gasoline endothermic or exothermic?

• Endothermic

• Exothermic

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 

• Warm

• Cold

What happens to the bonds when 2 substances react

• They break so new bonds can form

• Nothing the bonds are too strong

• They change colour

What type of reaction occurs in a hand warmer

• exothermic

• endothermic

Baking bread and cooking an egg are examples of....?

• Endothermic processes

• Exothermic processess

• None of these 

When iron nails get rusty, heat is released.  What process is this?

• Exothermic

• Endothermic