Define specific heat capacity.
A student carries out an experiment to determine the specific heat capacity of a liquid using the apparatus illustrated in the figure below.
Liquid enters the tube at a constant temperature of 
and leaves the tube at a temperature of 
. The mass of liquid flowing through the tube per unit time is 
. Electrical power 
is dissipated in the heating coil. The student changes and adjusts until the final temperature of the liquid leaving the tube is . The data shown in the table below are obtained.
Suggest why the student obtains data for two values of , rather than for one value.
Calculate the specific heat capacity of the liquid.
.
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