Question

A body A of mass 0.5kg and specific heat 0.85 is at a temperature of 60°C. Another body B of mass 0.3kg and specific heat 0.9 is at a temperature of 90°C. When they are connected to a conducting rod, heat will flow from ___________

(a) A to B

(b) Heat can’t flow

(c) B to A

(d) First A to B and then B to A

This question was posed to me in semester exam.

This intriguing question comes from Absorption and Emission topic in division Kinetic Theory of Gases of Engineering Physics I

Answer 1

Right choice is (c) B to A

The explanation: Heat always flows from a body at higher temperature to a body at a lower temperature.