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AP EAMCET2014PhysicsThermal Properties of Matter

A steam at 100^ C is passed into 1 ~kg of water contained in a calorimeter of water equivalent 0.2 ~kg at 9^ C till the temperature of the calorimeter and water in it is increased to 90^ C . The mass of steam condensed in kg is nearly (specific heat of water =1 cal / g ^ C , latent heat of vaporisation =540 cal / g )

Options

  1. A0.81
  2. B0.18
  3. C0.27
  4. D0.54

Correct answer

B. 0.18

Step-by-step solution

By calorimetry, Heat lost = Heat gained aligned m L+ & m C (T₁-T₂ ) & = (m₁+m₂ ) C (T₂-T₃ ) m 540 & +m 1 (100-90) & =(1000 ~g +200 ~g ) 1 (90-9) & =m 540+10 m=1200 81 550 m & =1200 81 m & = 1200 81 550 = 24 81 11 ~g & = 1944 11 ~g =176 ~g =0.176 ~kg aligned or m=0.18 ~kg

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