Describe an experiment to determine the specific heat capacity of a solid using the method of mixtures. 

Measurement of specific heat capacity of a solid by the method of mixtures

• A solid on mass, m_s kg and specific heat capacity, c_s, is heated in boiling water at temperature at temperature θ₁⁰C and quickly transferred to a calorimeter of heat capacity, C, containing water of mass, m₁ and , at the temperature θ₂.
• The final constant temperature θ₃ of the mixture is determined.

Assuming there is no heat loss

Heat lost by the solid = heat gained by calorimeter + heat gained by water

m_s x c_s x (θ₁ – θ₃) = (C + m₁)(θ₃ – θ₂)

where c_w is specific heat capacity of water

Precautions taken

• The calorimeter must be heavily lagged to minimize heat loss from the mixture.
• Transfer the solid fast to minimize heat loss from it during the transfer.
• Stir the mixture gently to ensure uniform temperature distribution without causing splashing or heat loss.
• Carry out the experiment several times to minimize errors
• Make correction for heat loss.

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Dr. Bbosa Science