ICSE Class 10 Answered
If specific heat capacity of solid = 500J perkg pe r°C
Calculate the specific latent heat of fusion of substance
Asked by lovemaan5500 | 15 Mar, 2018, 07:32: AM
Expert Answer
As per the given graph, 800 J of thermal energy is used to raise the temperature of the given substance from 0ºC to 80ºC. Mass of the substance is calculated from the give specific heat value as given below
m×Cp×ΔT = m×500×80 = 800; where m is mass, Cp is specific heat and ΔT is increase in temperature;
As per the graph, 800 J of thermal energy is used to melt completely the substance at constant temperature 80ºC.
Hence latent heat of fusion of the substance L is calculated as given below
m×L = 0.02×L = 800 J; we get L = 40 kJ/kg
we get m = 0.02 kg;
Answered by Thiyagarajan K | 15 Mar, 2018, 11:54: AM
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