temperature change

Question

If the volume of  and NaOH were kept at 50 mL but the concentration was doubled to 2 M, the observed temperature change would

a. double

b. half

c. be the same

d. don't know

Answer 1

Hi, Abigail

If you double the concentration, you have twice as much reaction and the evolution of twice as much heat. However, as you have the same amount of solution, the additional heat given off by the reaction would raise the temperature by about twice.