three student chemists measured 50.0ml of 1.00 M NaOH in separate styrofoam coff

Question

three student chemists measured 50.0ml of 1.00 M NaOH in separate styrofoam coffe cup calorimeters. Brett addede 50.0 ml of 1.10 M HCl to his solution of NaOH solution . dale added 45.5 ml of 1.10 MHCl( equal moles) to this NaOH solution. Lynday added 50.0ml of 1.00M HCl to her NaOH solution . each student recorded the temperature change and calculated the enthalpy of neutralization. Identify the student who observes a temperature change that will be different from that observed by the other two chemists. Explain why and how (higher or bigger ) the temperature will be different.

Explanation / Answer

the reading of bret will be different, since he added more number of moles to the solution and hence the mass of the solution icreases and thus the temperature change recorded is less than the temperature recorded by the other two

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