In order to change a solid to a liquid or a liquid to a gas, what is needed?

A high melting point.
A high boiling point.
A decrease in thermal energy.
An increase in thermal energy

An increase in thermal energy

Explanation:

I got it right on the quiz.

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

he would use the colour black