Question

Read the passage given below and answer
The basic principle of calorimetry is as follows: Heat gained by one body = Heat lost by other body. This
statement follows from the law of conservation of energy.
An aluminium container of mass 100 g contains 200 g of ice at -20 °C. Heat is added to the system at the
rate of 420 J s'. Specific heat capacity of ice = 2100 J kg 'K-,
specific heat capacity of aluminium = 840 J kg 'K' and latent heat of fusion of ice = 3.36 x 10°J kg!
39. The time required to raise the temperature of the container and ice from -20 °C to 0°C is
(A) 12 s
(B) 24 s
(C) 36 s
(D) 48 s
40. The time required to melt ice at 0 °C into water at 0 °C is
(A) 40 s
(B) 80 s
(C) 120 s
(D) 160 s​

Answer 1

Answer:

ohh my god

Explanation:

1.A)12s

2.D)160s