A body A of mass 0.5 kg and specific heat 0.85 is at a temperature of 60°C. Another body B of mass 0.3 kg 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 conducting rod is a metallic object that allows the flow of electric current due to the presence of free electrons. It is used in experiments or devices involving electricity or magnetism. The rod can transfer charge efficiently and is essential for understanding concepts like electromagnetic induction and electric circuits.
Class 11 Physics Chapter 10 Thermal Properties of Matter covers concepts of heat transfer specific heat capacity thermal expansion and calorimetry. It explains conduction convection and radiation along with thermal equilibrium and the laws of heat transfer. This chapter is crucial for understanding thermodynamics and its applications in the CBSE Exam 2024-25.
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We have to calculate the heat capacity of both bodies and compare the initial temperatures to determine which way the heat will flow.
The formula for heat capacity (C) is:
C = m × s
where:
m = mass,
s = specific heat.
Body A:
Cₐ = 0.5 × 0.85 = 0.425
Body B:
C_b = 0.3 × 0.9 = 0.27
The body having a higher product of mass and specific heat will have more thermal energy at the same temperature. However, in this case, the temperature plays a major role in deciding where the direction of heat will be.
Initial temperatures:
– A = 60°C
– B = 90°C
As body B has a higher temperature than body A, the heat will flow from B to A.
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