Heat in a system can be calculated by multiplying the given mass to the
specific heat capacity of the substance and the temperature difference. It is
expressed as follows:<span>
Heat = mC(T2-T1)
Heat = 100(1)(60-20) <span>Heat = 4000 calories addition to the system</span></span>
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<span><span>Hope this answers the question. Have a nice day.</span></span>