Calorimetry

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By Expert Faculty of Sri Chaitanya
Question

What will be the temperature, when 150 g of ice at 0°C is mixed with 300 g of water at 50°C? Specific heat of water =1 ca lg-1°C. Latent heat of fusion of ice = 80 -1 ca lg-1.

Moderate
Solution

Let us assume that T > 0° CHeat lost by water = Heat gained by ice to melt + heat gained by water formed from iceHence, our assumption that T > 0°C is correct.

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A bullet of mass 5g , Travelling with a speed of  210 m/s , strikes a fixed wooden target . One half its kinetic energy is converted in to heat in the bullet while the other half is converted in to heat in the wood. The rise of temperature of the bullet if the specific heat of the material is 0.030 cal/$\left({\text{g-}}^{\text{0}}\text{C}\right)\left(1cal=4.2×{10}^{7}\text{ergs}\right)$ close to: