In order to determine the molar of neutralization of sodium hydroxide, 100cm3 of 1M sodium hydroxide and 100cm3 of 1 M hydrochloric acid both at the same initial temperature were mixed and stirred continuously with a thermometer. The thermometer of the resulting solution was recorded after every 30 seconds until the highest temperature of the solution was attained.
Thereafter the temperature of the solution was recorded for a further two minutes
I. What is the significance of point Y2?
II. Explain why there is a temperature change between points;
Y1 and Y2
Y3 and Y4
(iv) In the initial temperature for both solutions was 24.50C and the highest temperature attained by the mixture was 30.90C
I. heat change for the reaction (specific heat capacity of the solution = 4.2Jg -1K-1 and the density of the solution = 1.0g/cm3
II. Molar heat of neutralization of sodium hydroxide
(v) Explain how the value of the molar heat of neutralization obtained in this experiment would compare with the one that would be obtained if the experiment was repeated using 100cm3 of 1 Methanoic acid instead of hydrochloric acid.
(b) On the grid provided below, draw an energy level diagram for the reaction between hydrochloric acid and sodium hydroxide
Related Chemistry Questions and Answers on Energy Changes in Chemical and Physical Processes Form 4 Level
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