You have a gas confined to a cylinder with a movable piston. What would happen t

Question

You have a gas confined to a cylinder with a movable piston. What would happen to the gas pressure inside the cylinder if you do the following? (a) Double the volume while holding the temperature constant. (b) Reduce the temperature (in Kelvin) to one-fourth the original value while holding the volume constant. Nickel(II) sulfate, used for nickel plating, is prepared by treatment of nickel(II) carbonate with sulfuric acid: NiCO_3 + H_2SO_4 NiSO_4 + CO_2 + H_2O (a) How many grams of H_2SO_4 are needed to react with 49.0 g of NiCO_3? (b) How many grams of H_2O are obtained if the yield is 78.9%?

Explanation / Answer

Question 5.

a)

If we double volume, while T is constant

the only way this will be possible is by DECREASING pressure

More space, implies more space for molecules, so less collision, less pressure

P decreases by 2x

b)

If we reduce the Temperature bu 1/4 of original... the volume will:

decrease as well, since raito is directly, i.e. V/T = C

Therefore

The new volume will be 1/4*V of original volume

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