Question

if 5j are taken away by heat from the system, and the system does 5 j of work, what is the change in internal energy of the system?

Answer 1

The change in internal energy of the system is -10 J.

Step-by-step explanation:

The change in internal energy of a system can be calculated using the first law of thermodynamics. The first law states that the change in internal energy (ΔU) is equal to the heat transferred to the system (Q) minus the work done by the system (W). In this case, if 5 J of heat is taken away from the system and the system does 5 J of work, the change in internal energy is given by ΔU = Q - W = -5 J - 5 J = -10 J. Therefore, the change in internal energy of the system is -10 J.

Answer 2

The change in internal energy of the system is -10 J, indicating the system lost 10 joules of internal energy.

Step-by-step explanation:

To find the change in internal energy of a system in Physics, we use the first law of thermodynamics, which can be expressed as ΔU = Q - W, where ΔU is the change in internal energy, Q is the heat added to the system, and W is the work done by the system. In this scenario, if 5 J are taken away by heat from the system (Q = -5 J), and the system does 5 J of work (W = 5 J), we can calculate the change in internal energy (ΔU) of the system by substituting the given values into the equation.

ΔU = Q - W = (-5 J) - (5 J) = -10 J

Therefore, the change in internal energy of the system is -10 J. This means that the system has lost 10 joules of internal energy.