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what happens in a free expansion?
Free expansion is a thermodynamic process in which a gas expands into a vacuum or an empty container without any external work being done on the gas.
The temperature of the gas remains constant during free expansion. This is because the expansion occurs quickly and there is not enough time for heat transfer to occur.
Yes, the pressure of the gas decreases during free expansion. This is because the volume of the gas increases while the number of gas molecules remains the same.
Yes, free expansion is an irreversible process. This means that the gas cannot spontaneously return to its original state without external work being done.
The equation for calculating work in free expansion is W = -PΔV, where W is work, P is pressure, and ΔV is the change in volume. Since there is no external pressure acting on the gas during free expansion, the work done is zero.