Background:
Specific Heats J/g°C
Water 4.184
Aluminium 0.894
Brass 0.385
Copper 0.385
Lead 0.129
Stainless Steal 0.490
Zinc 0.390
Specific Heat Equation:
Qw= MwCw(/\T)w
Procedure:
- Choose metal
- Weigh empty beaker
- Weigh beaker with 125 mL water in it
- Weigh metal
- Weigh beaker with metal and water in it
- Find initial water temp
- Heat beaker with water and metal in it
- When water boils, turn off hot plate and measure water temperature with probe
- Take metal out of heated water, drop into second beaker of room temperature water
- Record temp change in second beaker with temperature probe
- Clean up materials
- Beaker- 96.273g
- Water- 124mL
- Beaker w/water- 217.01g
- Metal- 87.466g
- Beaker w/metal w/water- 304.20g
Beaker 1 (Initial temperature) - 21.0 degrees Celsius
Beaker 2 (Initial temperature) - 21.1 degrees Celsius
Boiling water w/metal - 99.9 degrees Celsius
Metal in 2nd Beaker - 22.5 degrees Celsius
Calculations:
(Refer to data above)
22.5 degrees Celsius - 21.1 degrees Celsius= 1.4 degrees Celsius
217.01g beaker/H2O - 96.273g beaker = 120.737g Water
120.737g H2O x 4.184 x 1.4 = 707.23
We predicted that our metal was Lead not only because of the heat retained, but also because it wrote like a pencil. It left a significant amount of black on anything it touched.
Calculations:
(Refer to data above)
22.5 degrees Celsius - 21.1 degrees Celsius= 1.4 degrees Celsius
217.01g beaker/H2O - 96.273g beaker = 120.737g Water
120.737g H2O x 4.184 x 1.4 = 707.23
We predicted that our metal was Lead not only because of the heat retained, but also because it wrote like a pencil. It left a significant amount of black on anything it touched.
Use the heat the water gained to find the specific heat of the metal. And pencils contain carbon in the form of graphite, not lead ;)
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