Answer to Question #111632 in Chemistry for riley

Question

If 20g of water in a calorimeter increases temperature by 50C, how many joules
have been absorbed?

Answer 1

Solution:

To calculate the amount of heat entering or leaving a system, the equation Q = mcΔT is used.

m = mass (in grams)

c = specific heat capacity (J/g°C)

ΔT = change in temperature (°C).

Specific heat of water is 4.18 J/g°C

ΔT = 50°C

Then,

Q = mcΔT = (20 g) * (4.18 J/g°C) * (50°C) = 4180 J = 4.18 kJ.

Q = 4180 Joules.

Answer: 4180 Joules have been absorbed.