Question

What is the heat, q , in joules transferred by a chemical reaction to the reservoir of a calorimeter containing 125 g of dilute aqueous solution ( c = 4.184 j g ⋅ ∘ c ) if the reaction causes the temperature of the reservoir to rise from 21.5 ∘ c to 24.5 ∘ c ?

Answer 1

The heat (q) transferred to the calorimeter's reservoir containing a 125 g dilute aqueous solution is calculated using the formula q = mcΔT. The result is approximately 1573 joules.

Step-by-step explanation:

To calculate the heat (q) transferred in joules by a chemical reaction in a calorimeter, you can use the formula:

q = mcΔT

Where:

• m is the mass of the solution
• c is the specific heat capacity of the solution
• ΔT is the change in temperature

For the given question, the mass (m) of the dilute aqueous solution is 125 g, the specific heat capacity (c) is 4.184 J/g°C, and the temperature change (ΔT) is (24.5 °C - 21.5 °C) = 3.0 °C. We plug these values into the formula:

q = (125 g)(4.184 J/g°C)(3.0 °C)

Calculating this gives:

q = 1573 J

Therefore, the approximate amount of heat transferred to the reservoir of the calorimeter is 1573 joules.