Problem Answer

This reaction is exothermic (i.e. calorimeter liquid temperature went UP), so the heat of the reaction is - 4250 calories.


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Calculate Stoichiometry Expression

Calculating with Q=cmΔt


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Problem


A chemical reaction takes place inside of a metal container that is immersed in 1360 grams of a liquid. The initial temperature of the liquid is 29.9 degrees C. The chemical reaction causes the temperature of the liquid to change. After the chemical reaction, the final temperature of the liquid is 44.7 degrees C. Is the chemical reaction exothermic or endothermic, and how many calories of heat are exchanged as a result of the chemical reaction? The specific heat of the liquid is 0.211 cal/gC. Note: Answer must reflect correct sign and magnitude.

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