can you please circle the answers A mixture of gaseous reactants is put into a c

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can you please circle the answers

A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) 1 atm pressure piston From previous experiments, this chemical reaction is known to release 112. kJ of energy bath The temperature of the water bath is monitored, and it is determined from this data that 119. kJ of heat flows into the system during the reaction. gases O exothermic O endothermic O up Is the reaction exothermic or endothermic? Does the temperature of the water bath go up or | 0 down down? O neither irn O out O neither O does work O work is done on it O neither Does the piston move in or out? Does the gas mixture do work, or is work done on it? How much work is done on (or by) the gas mixture? Be sure your answer has the correct number of significant digits kJ Explanation Check

Explanation / Answer

Ans 1

Given data

Heat released by reaction

?? U = - 112 kJ

Heat flows into system

Q = + 119 kJ

The reaction is endothermic

Since heat flows into the system from the water bath. Water bath loses heat therefore the temperature of water bath goes down.

From the first law of thermodynamics

?? U = Q + W

W = - 112 - 119 = - 231 J

W < 0, system has done work, the piston moves out.

The gas mixture does work

W = - 231 kJ

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