Why must I add energy to a substance, e.g. water, to increase its temp?

Answer 1

Temperature and heat are measurement's of an object's molecule's average kinetic energy. Increase the kinetic energy by adding any type of energy to excite the molecules, and you'll increase the temperature/heat. Look into the kinetic molecular theorem

Answer 2

Adding energy to a substance increases the kinetic energy of the molecules of the substance thus they collide more with each other and collisions give off heat, thus increasing the temperature of the substance.

Answer 3

Temperature represents the energy state of a substance. Higher the temperature, more is the energy of the molecules. So, it is clear that to raise the temperature of any material, we need to add energy to it.

Answer 4

Every substance has a different state.. eg.water is in liquid state.. it exists as a liquid in normal state. if u want to turn it into vapour u need to supply more energy[gas] or if u want to turn it into ice u must again supply energy[current through refrigerator]. if u just want to heat u can supply respective amount of energy cuz the state is intermediate[atleast some part of water gets evaporated, though negligible]

Answer 5

including skill to a substance will strengthen the kinetic skill of the molecules of the substance as a effect they collide more suitable with one yet another and collisions provide off warmth, as a effect increasing the temperature of the substance.