Calculate the change in internal energy of the system in a process for which 100J of heat is absorbed by the system from surroundings and does 85J of work.
(I want to learn the solution on how to calculate it... pls. help thank you... )
To calculate the change in internal energy of a system, you can use the First Law of Thermodynamics, also known as the Law of Conservation of Energy. The equation is as follows:
ΔU = Q - W
Where:
ΔU is the change in internal energy of the system,
Q is the heat absorbed by the system from the surroundings, and
W is the work done by the system.
In your case, the values are:
Q = 100 J (heat absorbed by the system from surroundings)
W = 85 J (work done by the system)
To find the change in internal energy, substitute the given values into the equation:
ΔU = 100 J - 85 J
ΔU = 15 J
Therefore, the change in internal energy of the system is 15 J.