What does the law of conservation of energy state?

Energy cannot be created or destroyed, only transferred or transformed

A reaction absorbs 600 kJ breaking bonds and releases 800 kJ forming bonds. How is it classified?

Exothermic, net 200 kJ released

The particles must collide with enough energy and the correct orientation

Particles move faster, colliding more often and with more energy

By providing a pathway with a lower activation energy

The height from the reactant level up to the peak

The forward and reverse reactions occur at the same rate, so concentrations stay constant

Toward the products, to use up the added reactant

12questions. Pick an answer and you'll see why right away.

A reaction makes its surroundings colder. How is it classified?
What does the law of conservation of energy state?
What happens to energy when a chemical bond is broken?
A reaction absorbs 600 kJ breaking bonds and releases 800 kJ forming bonds. How is it classified?
According to collision theory, what must be true for a collision to cause a reaction?
Why does increasing the temperature speed up a reaction?
How does a catalyst increase the rate of a reaction?
On a potential energy diagram, what is the activation energy?
A potential energy diagram shows products lower in energy than reactants. What does this indicate?
What does dynamic equilibrium mean for a reversible reaction?
Adding more reactant to a system at equilibrium shifts it in which direction?
For the exothermic reaction $\text{N}_2 + 3\text{H}_2 \rightleftharpoons 2\text{NH}_3$ , which change increases the amount of ammonia?