Sun October 07, 2012 By:
i)It is said that the absolute value of inetrnal energy cannot be found then how are we able to measure the change in internal enegry?
dU= u2 - u1

How can we know the change in internal energy?

Expert Reply
Mon October 08, 2012
For a system undergoing only thermodynamics processes, i.e. a closed system that can exchange only heat and work, the change in the internal energy is 
So, we can measure the internal energy change using the parameters of heat and work done.
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