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.