Question

Certain amount of heat is given to 100 g of copper to increase its temperature by 21 C if the same amount of heat is given to 50 g water then the rise in its temperature is​

Answer 1

Answer:

=4∘C

Explanation:

The amount of heat supplied is given by the

relation Q=mcΔT

Here , m = 100g = 0. 1 kg,c = 400J/ kg -K

ΔT=21 K  for copper

Thus,Q = 0.1×400×21 = 840J

Hence , 840=0.05×4200×ΔT

⇒ΔT=4∘C

Answer 2

Explanation:

The amount of heat supplied is given by the

relation Q = mc∆T

Here , m = 100g = 0. 1 kg,c = 400J/ kg -K

∆T = 21k for copper

thus,. Q =0.1 X 400 X 21 = 840J

Hence , 840 = 0.05 X 4200 X ∆T

∆T = 4°c