A student is performing Part C and does not completely dissolve the NaOH

A student is performing part c and does not

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2.A student is performing Part C and does not completely dissolve the NaOH pellets before acquiring the final temperature. How will this affect his value for ΔHRand his percent error calculations? (5 points) 3.In a different experiment it is observed that 252 J of heat must be absorbed to raise the temperature of 50.0 g of Ni(s) from 20.0 to 31.4 . Calculate the specific heat of Ni in both J/g·and cal/g·. (5 points) 4.For the three reactions studied in this experiment, demonstrate how the third reaction is the sum of the first two reactions. Which species “cancel out”? (5 points) 13
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CHEM 212 Lab 9: CALORIMETRY AND HESS’S LAW Name:_________________________ Dry Lab Lab Session: _____________________ When the first substance dissolves, it releases heat, which then causes neutralization to occur. Heat of reaction cancels out. Quiz Questions 1.What is the most important requirement of a calorimeter? (3points) 2.Do you classify the reactions in this experiment as exothermic or endothermic? Why?(4 points) 3.In the hands-on experiment, students are instructed to pour all the waste solutions into the sink. Explain why this is a safe disposal procedure for this lab. (4 points) 14
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