A balloon of air deflates and does 300kj of work to the surrounding air. While deflating, the air inside the balloon transfer 60kj of energy to the outside of the balloon. What is the total change of the internal energy of the air inside the balloon when it deflates
To find the total change in internal energy of the air inside the balloon, we need to consider the work done by the balloon on the surrounding air and the energy transferred from the inside to the outside of the balloon.
Given:
Work done by the balloon on the surrounding air = -300 kJ (negative because the work is done on the surrounding air)
Energy transferred from the inside to the outside of the balloon = -60 kJ (negative because energy is transferred out of the system)
Total change in internal energy of the air inside the balloon = Work done + Energy transferred
= -300 kJ + (-60 kJ)
= -360 kJ
So, the total change in the internal energy of the air inside the balloon when it deflates is -360 kJ.
To find the total change in internal energy of the air inside the balloon when it deflates, we need to consider the work done by the air and the energy transferred to the outside of the balloon.
The total change in internal energy (ΔU) can be calculated using the equation:
ΔU = Q - W
Where:
ΔU is the change in internal energy
Q is the heat transfer
W is the work done
Given:
The balloon does 300 kJ of work on the surrounding air (W = -300 kJ)
The air inside the balloon transfers 60 kJ of energy to the outside (Q = -60 kJ)
Substituting the given values into the equation, we have:
ΔU = -60 kJ - (-300 kJ)
= -60 kJ + 300 kJ
= 240 kJ
Therefore, the total change in the internal energy of the air inside the balloon when it deflates is 240 kJ.