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Each question below is unique and do not borrow information from a previous part.

a. Sometimes farmers use barrels of hot water to keep their barns warm in the winter. How much heat would need to be removed from a barrel (42L) for it to go from 90 ^oC water to 0^oC ice?

b. A molecule of nitrojen gas at 300K has how much KE (on avarege)?

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