Question

A reaction occurs inside a calorimeter. The calorimeter contains 452.6 grams of water and the reaction caused the temperature of the water to rise from 21.64°C to 26.88°C. Calculate Q for the reaction in joules.

Answer 1

The reaction caused the water temperature to rise, resulting in approximately 9935 joules of heat being released.

Step-by-step explanation:

To calculate Q, the amount of heat absorbed or released during the reaction in the calorimeter, we use the formula:

Q = mcΔT

where:

• m is the mass of the water in grams
• c is the specific heat capacity of water (4.184 J/g°C)
• ΔT is the change in temperature in °C

For this reaction:

• m = 452.6 g (mass of the water)
• c = 4.184 J/g°C (specific heat capacity of water)
• ΔT = 26.88°C - 21.64°C = 5.24°C (change in temperature)

Substitute the values into the equation:

Q = (452.6 g) x (4.184 J/g°C) x (5.24°C)

Q = 9934.75952 J

The reaction inside the calorimeter caused approximately 9935 joules of heat to be released (in 200 flag free words).