Properties Of Solids And Liquids Question 407

Question: One end of a uniform rod of length 1 m is placed in boiling water while its other end is placed in melting ice. A point P on the rod is maintained at a constant temperature of 800C . The mass of steam produced per second is equal to the mass of ice melted per second. If specific latent heat of steam is 7 times the specific latent heat of ice, the distance of P from the steam chamber must be

Options:

A) (1/7) m

B) (1/8) m

C) (1/9) m

D) (1/10) m

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Answer:

Correct Answer: C

Solution:

[c] Q1=kA(800100x)t=mLstream

Q2=kA(8001001x)t=mLice

Dividing (700x)(1x800)=7 or 1x=8xorx=19m



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