One tonne of refrigeration is equivalent to the absorption of how much heat per minute?

One tonne of refrigeration is a measure used to describe the cooling capacity of a refrigeration system. Specifically, it refers to the amount of heat energy that is absorbed to freeze one tonne (or 1000 kilograms) of water at 0 degrees Celsius in 24 hours.

To calculate this, we consider that the latent heat of fusion for water is approximately 334 kJ/kg. Therefore, to freeze 1000 kg of water, the total heat absorbed would be:

1 tonne x 334 kJ/kg = 334,000 kJ

To find out how much heat this equates to per minute, we need to divide this total amount by the total number of minutes in 24 hours. Since there are 1440 minutes in a day (24 hours x 60 minutes), we perform the following calculation:

334,000 kJ / 1440 minutes = approximately 232.22 kJ/min

This figure is typically rounded to 233 kJ. Therefore, one tonne of refrigeration can effectively absorb heat at a rate of 233 kJ per minute, making this the correct answer.