How could I find the rate of heat absorption?

In summary, The rate of heat absorption can be measured using a calorimeter and can be calculated using the formula Q/t = mCΔT. It can vary for different substances and can affect the temperature and rate of temperature change in a substance. Factors such as atmospheric pressure, heat loss, and errors in measurement can impact the accuracy of measuring the rate of heat absorption.
  • #1
Gradders
1
0

Homework Statement



At what rate is a refrigerator absorbing heat if 2·15 kg of water at 21·5 °C is just frozen in 2·00 h?



Homework Equations



Q = mL
Q = mcΔT



The Attempt at a Solution



Rate of Heat Absorbed = Q/t
= mcΔT/t
= (2.15*4.2*21.5)/(2*60*60)
= 2.6*10^-2

The actual answer should be 1·27x10^2 Js-1
 
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  • #2
You calculated the rate to lower the temperature of the water from 21.5 C to 0 C. After you remove this heat, the water will still be liquid. How much more heat do you have to remove to turn it into ice?
 

Related to How could I find the rate of heat absorption?

1. How do I measure the rate of heat absorption?

The rate of heat absorption can be measured using a device called a calorimeter. This device measures the amount of heat absorbed by a substance through changes in temperature.

2. Is there a formula for calculating the rate of heat absorption?

Yes, the formula for calculating the rate of heat absorption is Q/t = mCΔT, where Q is the amount of heat absorbed, t is the time, m is the mass of the substance, C is the specific heat capacity, and ΔT is the change in temperature.

3. Can the rate of heat absorption vary for different substances?

Yes, the rate of heat absorption can vary for different substances depending on their specific heat capacity and other factors such as density and thermal conductivity. Some substances may absorb heat at a faster rate than others.

4. How does the rate of heat absorption affect the temperature of a substance?

The rate of heat absorption directly affects the temperature of a substance. As heat is absorbed, the temperature of the substance will increase. The rate of heat absorption can also affect the rate of temperature change in a substance.

5. Are there any factors that can impact the accuracy of measuring the rate of heat absorption?

Yes, there are several factors that can impact the accuracy of measuring the rate of heat absorption. These include changes in atmospheric pressure, heat loss to the surrounding environment, and errors in measuring equipment or technique. It is important to control for these factors to ensure accurate results.

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