2 How should the two heats of reactions for the neutralizati

2. How should the two heats of reactions for the neutralization of NaOH and the two acids compare? Why?

3. The experimental procedure has you wash your thermometer and dry it after you measure the temperature of the NaOH solution and before you measure the temperature of the HC1 solution. Why?

Solution

2

If you don\'t wash the thermometer, residual NaOH will react with the HCl solution. This is a highly exothermic reaction and will change the temperature of the solution, and thus throw off your measurement.

1

a stronger acid should produce more heat that a weak acid, provided that they are in equal quantity.

strong acids, dissociate 100% that means that the hydrogen seperates from the rest of the atom 100% in aquios solution

for example HBr, in (aq) would be H+ and Br- completely. weak acids do not break apart 100%. now, the more H+ (the stronger the acid), the more H+ atoms there are to reack with the Na OH, meaning more bonds= more overall stability = more heat given off, because bonds are a stabilizing process.

reference

http://www.transtutors.com/chemistry-homework-help/chemical-thermodynamics/heat-of-neutralization.aspx