Questions
300 grams of water at is added to 100 grams of ice at , the final temperature of the mixture is
detailed solution
Correct option is D
Wateramount of heat lost by water is dQ1=mSdθ here m is mass of water ; S is specific heat of water; dθ is change in temperature of water when water looses its temperature from 250C to 00C, amount of heat lost is dQ1 dQ1=300×1×25=7500 calorieFor Iceamount of heat required to convert from ice to water is dQ2=mL where m is mass of ice ; L = latent heat of fusion of ice=80 cal g-1 dQ2=100×80=8000 caldQ2>dQ1i.e., Heat required is greater than heat availableStill ice remains= 0oCSimilar Questions
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/ close to:
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