Question Answers

Sahay Sir > Question Answers > JEE Mains Physics 2002-2019 Solved Video Solutions > Chapter 8 - Thermodynamics > An unknown metal of mass 192 g heated to a temperature of 100ºC was immersed into a brass calorimeter of mass 128 g containing 240 g of water at a temperature of 8.4 ºC. Calculate the specific heat of the unknown metal. If water temperature stabilizes at 21.5 ºC. (Specific heat of brass is 394 J kg^–1 K^–1)

An unknown metal of mass 192 g heated to a temperature of 100ºC was immersed into a brass calorimeter of mass 128 g containing 240 g of water at a temperature of 8.4 ºC. Calculate the specific heat of the unknown metal. If water temperature stabilizes at 21.5 ºC. (Specific heat of brass is 394 J kg^–1 K^–1)

A cylinder with fixed capacity of 67.2 lit contains helium gas at STP. The amount of heat needed to raise the temperature of the gas by 20 C is :