Asked by Anonymous

The combustion of 0.1572 g benzoic acid increases the temperature of a bomb calorimeter by 2.52°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.)
What is the heat capacity in kJ/C? = 1.65 kJ/C


A 0.2197-g sample of vanillin (C8H8O3) is then burned in the same calorimeter, and the temperature increases by 3.28°C. What is the energy of combustion per gram of vanillin?
Energy in kJ/gram?

I know how to find the heat capacity, but I keep getting the energy incorrect.

Answers

Answered by bobpursley
are you certain about the mass of benzoic acid? .1572g is a very small amount.
heatenergy= grams*1.65kJ/g=.1572*26.42 kJ/g= = 4.153 kJ or 4153J

second one: energy=Heatcapacity*changetemp

energy= 1.65kJ/c*3.28C=5.41kJ or 5410J
energycomputstion= 5.41kJ/.2195g = ..
Answered by Anonymous
What would be the correct number of sig figs?
Answered by bobpursley
three sig figs, or course
There are no AI answers yet. The ability to request AI answers is coming soon!

Related Questions