[tex]\bold{\huge{\orange{\underline{ Solution}}}}[/tex]
[tex]\bold{\underline{ Given :- }}[/tex]
[tex]\bold{\underline{ To \: Find :- }}[/tex]
[tex]\bold{\underline{ Let's \:Begin:- }}[/tex]
We know that,
Amount of heat energy = mass * specific heat * change in temperature
That is,
[tex]\sf{\red{ Q = mcΔT }}[/tex]
Subsitute the required values in the above formula :-
[tex]\sf{ Q = 250 × 4.180 ×(0 - 100 )}[/tex]
[tex]\sf{ Q = 250 × 4.180 × - 100 }[/tex]
[tex]\sf{ Q = 250 × - 418}[/tex]
[tex]\sf{\pink{ Q = - 104,500 J }}[/tex]
Hence, 104,500 J of heat is released to cool 250 grams of liquid water from 100° C to 0° C.
[tex]\bold{\underline{ Now :- }}[/tex]
We have to tell whether the above process is endothermic or exothermic :-
Here, In the above process ΔT is negative and as a result of it Q is also negative that means above process is Exothermic