The heat capacity of chloroform (trichloromethane, chcl3)
in the range 240k to 330k is given
bycpm/(jk-1mol-1) = 91.47
+7.5x10-2(t/k). in a particular experiment,
1.0molchcl3 is heated from 273k to 300k. calculate the
changein molar entropy of the sample.

Answer : The change in molar entropy of the sample is 10.651 J/K.mol

Explanation :

To calculate the change in molar entropy we use the formula:

where,

= change in molar entropy

n = number of moles = 1.0 mol

= final temperature = 300 K

= initial temperature = 273 K

= heat capacity of chloroform =

Now put all the given values in the above formula, we get:

Therefore, the change in molar entropy of the sample is 10.651 J/K.mol

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.