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A gaseous reactants is put into a cylinder, where a chemical reaction turns gase

ID: 1054802 • Letter: A

Question

A gaseous reactants is put into a cylinder, where a chemical reaction turns gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 aim. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) From previous experiments, this chemical reaction is known to release 387. kJ of energy. The position of the piston is monitored, and it is determined from this data that the piston does 151. kJ of work on the system during the reaction. Is the reaction exothermic or endothermic? exothermic endothermic Does the temperature of the water bath go up or down? up down neither Does the piston move in or out? in out neither Does heat flow into or out of the gas mixture? in out neither How much heat flows? Round your answer to 3 significant digits. kJ

Explanation / Answer

From the given data shown above,

The reaction is = Exothermic

The temperature of the water bath go = up

The piston move = down

Heat flow of the gas mixture = out

Heat flow = -387 - 151 = -538 kJ

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