Heat Capacity Lab

Specific Heat Capacity Lab

Sample Material Mass of Sample (kg) Initial Temperature of hot Water. (oC) Initial Temperature of cool water (oC) Final Temperature of sample/ water (oC) п‚Ñžt of Water (oC) Specific heat Capacity of Sample (J/kg oC) Mass of Cold Water

Brass 68.2Ð'± 0.5

Ð'±0.0005

=0.0682 kg 97.5 Ð'± 0.2 24.0 Ð'± 0.2 28.2 Ð'± 0.2 4.2 Ð'± 0.4 3.99 x 10 -2 107g Ð'± 1

0.107 kg Ð'± 0.001 kg

-Qsolid = Qwater

-c • m • п‚Ñžt = c • m • п‚Ñžt

-c = c • m • (Tf вЂ"Ti)

m • (Tf вЂ" Ti)

-c = 4200 J • 0.107 kg (28.2 oC вЂ" 24.0 oC)

____kg/ oC_____________________

0.0682 kg • (28.2 oC вЂ" 97.4 oC)

-c = -1887.48

4.72626

c = 399. 3601706 J/kg oC

Calculations

-Qsolid = Qwater

-c • m • п‚Ñžt = c • m • п‚Ñžt

-c = c • m • (Tf вЂ"Ti)

m • (Tf вЂ" Ti)

-0.107 Ð'± 0.001 • 4200 (28.2Ð'± 0.2 вЂ" 24. 0 Ð'± 0.2)

0.0682 Ð'± 0.0005 (28.2 Ð'± 0.2- 97.5 Ð'± 0.2)

-449.4 Ð'± 4.2 (4.2 Ð'± 0.4)

0.0682 Ð'± 0.0005 ( - 69,3 Ð'± 0.4)

-449.4Ð'± 4.2 (4.2 Ð'± 0.4 )

449.2 4.2

0.0682 Ð'± 0.0005 (-69.3 Ð'± 0.4)

0.0682 -69.3

-449.4 Ð'± 0.934% (4.2 Ð'± 9.52%)

0.0682 Ð'± 0.733% (69.3 Ð'± 0.5778%)

1887.48 Ð'± 10.454

4.72626 Ð'± 1.31

399.36 Ð'± 11.764

399.36 • 0.11764= 46.94

399.36 Ð'± 46.9 J/kg oC

Discussion Questions

1. After consulting table 8.4 on page 260 of the textbook table, possible metals used in this experiment include:

- Brass = 3.8 x 10 -2

- Copper = 3.9 x 10 -2

- Iron = 4.6 x 10 -2

2) Once figuring out that the unknown metal would either brass, copper or iron, research was done to figure out their own properties. Although the specific heat capacity points to Copper, that was not the case for physical properties of the metals. Our metal was a golden colour, and iron is not a golden colour, but rather a bright white