Heat Transfer and Calorimetry

Kinetic energy and Potential energy are actually related! They also have specific calculation for each one of them. 

Kinetic energy is related to temperature. Therefore, Ek is related to thermal changes. To figure out what is the thermal change in a substance, consequently Ek.

Q = mc^t

Q means thermal change

M means mass

c mens specific heat capacity

^t means the change in temperature.

When we are talking about potential energy, we talk about enthalpy. Enthalpy is the total energy of a substance so Ek and Ep. When we say that there is a change in enthalpy, we talk about the difference between the Ep of the products and reactants.  REMEMBER THAT CHANGE IN ENTHALPY DOES NOT HAVE ANYTHING TO DO WITH CHANGE IN TEMPERATURE. 

Molar change in enthalpy - Change in the Ep per mole of a substance.

To figure the Enthalpy change, we always look at the calculalio ^^H= n^^Hm

^^^H means enthalpy change 

n means moles 

^^Hm means molar enthalpy change

The molar enthalpy of FORMATION will be listed on you r data booklet, The molar enthapy of DECOMPOSITION is the same of the formation, but with a reversed sign. For the other reaction, like combustion, it will be said in the question, or you will have to figured it out.  The molar enthalpy of elements is 0.