Specific heat capacity ; voltage ; heating water

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SUMMARY

The discussion focuses on an experiment measuring the specific heat capacity of water by heating it from 20 to 35 degrees Celsius. The experiment utilizes a properly insulated beaker, a heating element, and a multimeter to measure voltage and current, allowing for the calculation of power using the formula P = IV. The energy provided is then related to the specific heat capacity through the equation P = mc(ΔT). The experimenter also considers altering the concentration of salt in the water, prompting a discussion on maintaining constant variables for accurate results.

PREREQUISITES
  • Understanding of specific heat capacity and its calculation
  • Familiarity with electrical power formulas (P = IV)
  • Knowledge of experimental design and control variables
  • Basic principles of thermodynamics related to heat transfer
NEXT STEPS
  • Research methods for measuring specific heat capacity in liquids
  • Learn about the effects of solutes, such as salt, on water's thermal properties
  • Explore advanced techniques for minimizing heat loss in experiments
  • Study the principles of using multimeters for electrical measurements
USEFUL FOR

Students conducting physics experiments, educators teaching thermodynamics, and researchers interested in heat transfer and specific heat capacity measurements.

rishabharora
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Hi,
I am doing an experiment on the factors affecting the time to heat water from a set temperature to another, eg 20 to 35 deg C.
1. First, I have insulated the beaker properly, to minimise heat loss. I have connected a heating element to heat the water. Connected multimeter, give the voltage and current in the circuit. Using this, I can find the energy provided -
P = IV and then P = energy/ time.
Also, this should be equal to mc(delta temp) ; hence i can calculate the specific heat capacity.
I am altering the concentrating by adding salt.
Is this a viable method?? ?
Thanks
 
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For me, this experiment sounds fine. Remember to keep some of the variables to be constant though. Can you tell me all the variables you can think of which must be kept constant?
 

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