When you touch an object, why do you feel hot or cold?

When two different objects touch heat is always transferred from the warmer object to the colder object. If you touch something hot, energy is transferred from the hot object to you.

Explanation:

The higher the heat conductivity, the faster heat flows through the material by conduction. When two different objects touch heat is always transferred from the warmer object to the colder object. If you touch something hot, energy is transferred from the hot object to you.

Explanation:

one state would change   like louisiana to texas. thats a change

explanation:

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.