JEE Main 2017PhysicsThermal Properties of MatterMediumMCQ

JEE Main 2017 — Thermal Properties of Matter Question with Solution

JEE Main 2017 (08 Apr Online)

Question

In an experiment, a sphere of aluminium of mass 0.20 kg is heated up to 150°C . Immediately, it is put into water of volume 150 cc at 27oC kept in a calorimeter of water equivalent to 0.025 kg . The final temperature of the system is 40oC . The specific heat of the aluminium is(take 4.2 Joule=1 calorie )

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Show full solutionCorrect option: A
Correct answer
A434 J kg-1 oC

Step-by-step explanation

Let S be the specific heat of aluminium

Q given = Q used

⇒1000×0.2×S×(150−40)=150×1×(40−27)+25×1×(40−27)

⇒200×S×110=150×13+25×13

⇒S=13×175200×110=0.1034 cal g-1 °C

⇒S=103.4 ×4.2 J kg-1 °C=434 J kg-1°C

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About this question

This is a previous-year question from JEE Main 2017, covering the Thermal Properties of Matter chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.