Asked by Kelly
A 100.00 ml of volume of 0.500 M HCl was mixed with 100.00 ml of 0.500 M KOH in a constant pressure calorimeter. The initial temperature of individual acid and base was 23.0 oC. The final temperature after mixing was 25.5 oC. The specific heat of the solution was 3.97 J g-1 oC-1 Assume the density of the solution is 1.00 g mL-1
a) Calculate the heat of the reaction in kJ. (Be sure to use signs correctly.)
a) Calculate the heat of the reaction in kJ. (Be sure to use signs correctly.)
Answers
Answered by
DrBob222
q = mass x specific heat x ((Tfinal-Tinitial0
You know mass is 200 g
Specific heat is given in J
You have Tfinal and Tinitial.
Substitute and solve for q. Remember this is an exothermic reaction (it gives off heat), so place a negative sign for the number is J. Convert to kJ.
Most problems I've seen like this ask for kJ/mol but you only asked for kJ of heat so I stopped there.
You know mass is 200 g
Specific heat is given in J
You have Tfinal and Tinitial.
Substitute and solve for q. Remember this is an exothermic reaction (it gives off heat), so place a negative sign for the number is J. Convert to kJ.
Most problems I've seen like this ask for kJ/mol but you only asked for kJ of heat so I stopped there.
Answered by
Will
-1.985
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