Question

Define internal energy ????

Answer 1

Heat :
the quality of being hot; high temperature:
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internal energy :
# The internal energy of a system is the sum of all kinetic and potential energy in a system.
# While a system does not contain 'heat,' it does contain a total amount of energy called internal energy. 

Answer 2

Answer:

• Internal energy of a system is the sum of K.E. and P.E. of the molecules of the system.