A red hot sphere of iron (specific heat capacity = 0.11 cal/gm °C) weighs to 1kg. If the sphere cools 1200°C, what is the equivalent loss in mass?
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A red hot sphere of iron (specific heat capacity = 0.11 cal/gm °C) weighs to 1kg. If the sphere cools 1200°C, what is the equivalent loss in mass?
Heat energy lost by sphere = m*s*t
= 1000g × 0.11 × 1200
= 132 × 10³ cal
= 132 × 10³ × 4.2 × 10^7 ergs
= 5.544 * 10^12 ergs
The loss in mass equivalently = E/c²
= 5.544 * 10^12 / (3*10^10)²
= 0.616 * 10^-8 gm
= 6.16 * 10^-9 gm.
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Answer:
Your answer is in attachment
Given
Temperature = 1200°C
mass = 1kg
s = 0.11
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