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Question

What is the amount of thermal energy required to raise the temperature of a 20g copper sample from 20°C to 50°C, given the specific heat of copper is 0.385 j/g °c?

Answer

The amount of thermal energy required to raise the temperature of a 20g sample of copper from 20°C to 50°C is 231 J. Thermal energy is the entire quantity of kinetic energy found in the particles of an object or material, connected to atomic and molecular motion within a substance. It can be transformed into mechanical energy and is used in various processes such as heating houses, preparing food, and creating electricity.

To calculate thermal energy needed for raising the temperature of a substance, use the formula Q = m x c x ΔT. Where Q=thermal energy in joules (J), m=mass of the substance in grams (g), c=specific heat capacity of the substance in J/g°C, and ΔT=change in temperature in °C (final temperature - initial temperature). In this problem, Q = 20g x 0.385 J/g°C x (50°C - 20°C) = 231 J. This means that 231 joules of energy is required to increase the temperature of a 20g copper sample from 20°C to 50°C.