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Grade 11Thermal Physics

10gm of ice cubes at 0°C are released in a tumbler (water equivalent 55 g) at 40°C. Assuming that negligible heat is taken from the surroundings, the temperature of water in the tumbler becomes nearly (L = 80 cal/g)

(a) 31°C

(b) 22°C

(c) 19°C

(d) 15°C

Profile image of Simran Bhatia
12 Years agoGrade 11
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1 Answer

Profile image of Amit Saxena
12 Years ago

(b)

Let the final temperature be T

Heat gained by ice = mL + m × s × (T- 0)

= 10 × 80 + 10 × 1 × T

Heat lost by water = 55 × 1 × (40 - T)

By using law of calorimetery,

800 + 10T = 55 × (40-T)

Þ T = 21.54° C = 22°C