48. A certain amount of ideal gas is subjected to isothermal compression at 300 K and an initial pressure of 81.04 kPa. In this case, the volume decreases from 44.8 l to 4.48 l. Determine the amount of gas, its final pressure, the change in thermodynamic functions ΔU, ΔH, ΔS, ΔA and ΔG, as well as the heat Q and work W.

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