Answer:
The temperature change is 22.8ºC = 72.8ºF = 295.8K = 532.5R
Step-by-step explanation:
The formulas used to convert the different temperatures are the following:
From ºF to ºC

From ºC to ºF

From ºC to K

From ºF to R

The initial temperature of the water is 82ºF = 27.8ºC and the final temperature is 5ºC. Thus, the temperature change is the difference between these two temperatures:
27.8ºC - 5ºC = 22.8ºC
Converting in all units the results are:
22.8ºC = 72.8ºF = 295.8K = 532.5R