Calculate heat lost or gained?


by HelloMotto
Tags: gained, heat, lost
HelloMotto
HelloMotto is offline
#1
Feb23-09, 05:56 PM
P: 74
0.100 mol/L + 23 ml of Potassium Hydroxide is mixed with 18 ml of hydrobromic acid. Calculate the heat gained or lost by the reaction.

The initial temperature was 20.1 celcius and the final was 24.5 celcius.

i have no clue how to solve this equation. Can someone give me clues and what equation to use?
Phys.Org News Partner Science news on Phys.org
Better thermal-imaging lens from waste sulfur
Hackathon team's GoogolPlex gives Siri extra powers
Bright points in Sun's atmosphere mark patterns deep in its interior
chemisttree
chemisttree is offline
#2
Feb26-09, 09:17 AM
Sci Advisor
HW Helper
PF Gold
chemisttree's Avatar
P: 3,725
The only important information you have is that 41 mL of solution is heated from 20.1 C to 24.5 C. You need the heat capacity and density of that solution (either given or make an assumption) to complete the calculation.

Do you know of a relationship between heat and temperature change, volume (mass?) and heat capacity?


Register to reply

Related Discussions
How many of C8H8's electrons has it gained/lost? Introductory Physics Homework 1
Q Gained = Q Lost Introductory Physics Homework 4
I lost my calculaor :( Plz calculate this for me!!! Introductory Physics Homework 13