One liter of argon gas at 300 k is expanded against constant external pressure from 10 to 100, at which point mechanical equilibrium is achieved. after the expansion, the temperature of the gas has fallen to 270 k. detemine q, w, ae and ah for this process. then do the same calculation, assuming molecular hydrogen vapor. treat both ar and h2 as ideal gases.

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acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .