thermochemistry

A chemical reaction that absorbs heat from the surroundings is said to be __________ and has a __________ ^H at constant pressure.

• endothermic, positive

• endothermic, negative

• exothermic, postive

• endothermic, negative

The reaction 4Al (s) + 3 O2 (g) ¬ 2 Al2 O3 (s) ^H = -3351 kJ

is __________, and therefore heat is __________ by the reaction

• exothermic, released

• exothermic, absorbed

• endothermic, released

• endothermic, absorbed

Heat flows from _______ to ______ objects

• cooler to warmer

• warmer to warmer

• warmer to cooler

• cooler to cooler

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

• energy

• chemistry

• work

• thermochemistry

Releasing heat into the surroundings occurs during an ___________________ reaction.

• endothermic

• isothermic

• exothermic

• thermal

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

• calory

• specific heat

• heat

• energy

Is the combustion of gasoline endothermic or exothermic?

• 
  The SI unit of energy is

• Heat capacity.

• Calorie.

• joule

• enthalpy

When your body is warmed by a blanket during the winter, this process is said to be

• exothermic

• endothermic

• isothermic

• heat change

If heat is released by a chemical system, an amount of heat will be ______

• absorbed by the surroundings

• absorbed by universe

• released by surroundings

• released by the universe