JEE Main 2017PhysicsThermal Properties of MatterMediumMCQ

JEE Main 2017 — Thermal Properties of Matter Question with Solution

JEE Main 2017 (02 Apr)

Question

A copper ball of mass 100 g is at a temperature T. It is dropped in a copper calorimeter of mass 100 g, filled with 170 g of water at room temperature. Subsequently, the temperature of the system is found to be 75°C. T is given by:
(Given: room temperature =30°C, specific heat of copper =0.1 cal g-1 °C-1)

Choose an option

Show full solutionCorrect option: C
Correct answer
C885°C

Step-by-step explanation

mcb=100 g, ToCmc=100 g, 30oCmw=170 g, 30oC

Net heat loss = Net heat gain

⇒100×0.1×T-75=100×0.1×75-30+170×1×75-30

⇒T-75=45+17×45

⇒T=885°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.