PHYS - Measuring Specific Heat Capacity of Water
Physics, specific heat capacity, heat, energy - IBDP | DSE | GCE | IAL | AP Physics
For IGCSE Physics, you need to know how to measure the specific heat capacity of water experimentally.
The experimental setup to determine to specific heat capacity of water is like this 👉
Important concepts you need to know in this experiment:
- Electrical energy is converted to heat energy by the heating coil.
- Formula for electrical energy:
E = Pt = VIt
E = electrical energy (J)
V = voltage (V)
I = electric current (A)
t = time (s)
- Formula for calculating amount of heat energy added:
Q = mc∆T
Q = heat energy (J)
m = mass (kg)
c = specific heat capacity (J/kg·°C)
∆T = change in temperature (°C)
Once you have obtained the voltage, current, and change in temperature, you need to plug these values into the equations.
Differences between Experimental Value and Real Value
The known value for the specific heat capacity of water is 4200 J/kg·°C. You may find that the value you obtained from your experiment is slightly different from the actual value.
What are some possible reasons for the difference?
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