Reference no: EM13842858

A) A factor that affects the speed of heterogeneous reactions but not of homogeneous reactions is

1)nature of reactants

2)concentration of reactants

3)area of contact between different phases

4) molecular size

5)the orientations of the molecules during a collision 6)None of the above

B)The sequence of chemical reactions that gives rise to a new overall chemical change is the

1)collision pathway

2)reaction mechanism

3)elementary process

4)reaction system

5)none of the above

C)The rate of a chemical reaction in the forward direction doesn't depend on

1)number of collisions per second between reactant molecules

2)orientation of molecules during collision

3)the temperature

4)the potential energy of the products

5)the activation energy

D)The rate of reaction increases primarily with temperature because:

1)as activation energy is lowered, temperature increases

2)changing the temperature alters the mechanism

3)The heat of reaction is increase

4)An endothermic process is helped along by increasing the temperature

5)A greater fraction of the molecules possess the activation energy