Question

When a solution of LiOH is neutralized by nitric acid, the solution gets hot.

Calculate the mass of the combined solution (in g).

Temperature change of the solution = 16.6 K

Heat change of the solution = 4530 J

Specific heat capacity of the solution = 4.18 J/g·K

Give your answer to three significant figures.

Answer 1

q = 4530 J

c = 4.18 J/gK

Δt = 16.6 K

q = mcΔt

$m = \frac{q}{cΔt}$

$m = \frac{4530}{4.18\times16.6} = 65.2 g$

Answer: 65.2 g