Question

A)
Which statement is true about molecule speed?
(1 point)
Slower molecules are smaller than faster molecules.
Faster molecules have more energy than slower molecules.
Slower molecules are oriented better than faster molecules.
Faster molecules have fewer collisions than slower molecules.

Using the graph and the chemical reaction shown is exothermic.
CH
+ N
+ H
à
CH
N + NH
Which statement about the reaction is correct?
(1 point)
4
2
2
3
3
It takes more energy to form C-H bonds in the reactants than is released from C-H bonds in the products.
The total chemical potential energy of the reactants is greater than the total chemical potential energy of theproducts.
Each reactant has more chemical potential energy than each product.
More chemical potential energy is stored in the bonds of CH
than in the bonds of CH
N.
4
3

Answer 1

1) Faster molecules have more energy than slower molecules.
- Explanation: Speed (kinetic energy) and temperature are directly related; faster-moving molecules have higher kinetic energy.

2) The total chemical potential energy of the reactants is greater than the total chemical potential energy of the products.
- Explanation: For an exothermic reaction the reactants are at higher potential energy than the products, and the excess is released as heat.