A person heats up a can of soup on a stove. If he does 250 Joules of work on the soup by stirring it as the burner adds 1675 Joules of heat, what is the change in its internal energy?
To determine the change in internal energy of the soup, we need to consider the conservation of energy. The total change in internal energy is equal to the work done on the soup plus the heat added to the soup.
In this case, the person is doing work by stirring the soup, and the burner is adding heat to it. The work done on the soup is 250 Joules, and the heat added to the soup is 1675 Joules.
Therefore, the change in internal energy of the soup can be calculated by adding the work done to the heat added:
Change in internal energy = Work done + Heat added
Change in internal energy = 250 Joules + 1675 Joules
By performing the addition:
Change in internal energy = 1925 Joules
So, the change in the soup's internal energy is 1925 Joules.