Chemistry W24-27

If a piece of chocolate cake contains 350 Calories, that is the equivalent of

• 350000cal

• 35000cal

• 35cal

• 350000cal

 

A unit of heat is the ________

• 
  

  joule/kg

• joule•g/sec

• joule

• joule/sec

The enthalpy change is designated as

• 
  ∆H

• 
  ∆G

• 
  ∆T

• 
  ∆E

A thermochemical equation includes

• specific temperature change

• 
  pressure change

• enthalpy change for the reaction

• time of reaction

The value of the equilibrium constant is affected by

• product concentration

• temperature

• 
  reactant concentration

• volume

The forward Haber-Bosch reaction is endothermic.

• True

• False

The formation of NO from nitrogen and oxygen in the atmosphere is non-spontaneous at normal temperatures and pressures.

• True

• False

When a reaction is exothermic, the ∆H term needs to be larger than the T∆S term for the reaction to be spontaneous.

• True

• False

The conversion of vapor directly to solid is known as vaporization.

• True

• False

An increase in pressure causes gas molecules to be forced closer together.

• True

• False