Question

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QUESTION 18 A metal object at 15.00 °C is heated by gaining 5.81 kJ of heat from the environment. The final temperature is 18.32 °C. What is the heat capacity, C, of the metal in units of kJ/ °C? O 85.4 kg/ qc O 612 kJ/ ºc O 416 kJ/ °C O 40.2 kg/ ºc O 1.75 kg/ ºc 29.5 kJ/ °C O 15.7 kJ/c

Answer 1

Answer :- (E) Heat capacity of metal = 1.75 kJ/^oC

Solution:-

for solving this question first we have to know the relation between heat and heat capacity then we have to use all the values

so as we know that

Heat = heat capacity * temperature change

or in the mathematical expression

Q = C * $\Delta$ T..............(1)

it is given that

Q= 5.81 kJ

$\Delta$T = T _final - T _initial = 18.32 - 15 = 3.32^oC

put these values in equation (1)

C= 5.81 / 3.32

C = 1.75 kJ/^oC

so the correct option is (E) 1.75 kJ/^oC

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