Describe with the aid of a diagram, an experiment to determine the specific heat capacity of a liquid using the continuous flow method.

Describe with the aid of a diagram, an experiment to determine the specific heat capacity of a liquid using the continuous flow method.

• A liquid is allowed to flow at constant rate
• Power is switched on and the liquid is heated until temperatures registered by T₁ and T₂ are steady and the values θ₁ and θ₂ respectively are recorded.
• The p.d V and current I are recorded from the voltmeter and ammeter respectively
• The mass, m of a liquid collected in time t is recorded
• At steady state; VIt = mc(θ₂ – θ₁) + h ………….. (i)

where h is heat lost to the surrounding

• The rate of flow is changed and the voltage and current are adjusted until the steady readings of T₁ and T₂ are θ₁ and θ₂ respectively
• If m₁, V₁ and I₁ are the values mass of liquid collected in time t, voltmeter and ammeter readings respectively, then

              V₁I₁t = m₁c(θ₂ – θ₁) + h ………….. (ii)

•  Subtracting (ii) from (i)

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