Chem Semester 2 Review

How heat is transfered?

• From high to low temperature
• From low to high
• Up to down
• Left to right

The lowest possible temperature is

• 0 F
• 0 K
• 0 C
• 273 K

Heat is defined as

• the transfer of thermal energy from one object to another due to temperature difference

• the temperature of a solid, liquid, or gas

• The kinetic energy of a solid, liquid, or gas.

_____ reactions usually feel hot!

• endothermic

• exothermic

In an endothermic reaction, energy is _________.

• absorbed

• released

____ reactions usually feel cold.

• endothermic

• exothermic

What instrument would you use to detect an endothermic or exothermic reaction?

• triple beam balance

• ruler

• thermometer

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• bubbles of gas appear
• dissolving

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

• Stay the same
• Increase
• Decrease

The initial temperature was measured to be 20^oC and the final temperature was 45^oC. The reaction was

• exothermic

• endothermic