CBSE Class 11-science Answered
Calculate the change in volume of an iron block 10cm ×20cm×5cm if its temperature is raised from 10°c to 40°c
Given coefficient of linear expansion of iron = 1.2×10^-5 °c ^-1
Asked by sanjanapujar80 | 12 Jun, 2021, 10:29: AM
Expert Answer
Initial volume Vo = 10 × 20 × 5 = 1000 cm3
final volume V after thermal expansion , V = Vo ( 1 + γ ΔT )
where γ is volume expansion coefficient and ΔT is change in temperature .
If α is linear expansion coefficient , then volume expansion coefficient γ = 3 α
γ = 3 × 1.2 × 10-5 ( oC )-1 = 3.6 × 10-5 ( oC )-1
final volume V = 1000 [ 1 + 3.6 × 10-5 × (40-10) ] = 1001.08 cm3
Answered by Thiyagarajan K | 12 Jun, 2021, 01:18: PM
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