Pasco TD-8557 Basic Calorimetry Set Manuel d'utilisateur télécharger pdf (Page 8)

Basic Calorimetry Set

Part 2: The Specific Heat of Antifreeze

Repeat Part 1 of this experiment, but instead of using the metal samples, heat approxi-

mately 100 g of antifreeze to approximately 60° C. Measure and record the temperature,

then quickly pour the antifreeze into a calorimeter containing cool water and stir until the

highest stable temperature is reached (about 1 minute). Record your data and calculations

on a separate sheet of paper. You will need the following data:

• M

cal

, the mass of the calorimeter,

• M

water

the mass of the calorimeter plus water,

• T

cool

the temperature of the cool water,

• M

total

, the mass of the calorimeter plus water plus antifreeze

• T

final

, the temperature of the water plus antifreeze.

Data and Calculations

Part 1

For each metal tested, use the equations shown below to determine M

water

, the mass of the

water used, ∆T

water

, the temperature change of the water when it came into contact with

the metal sample, and ∆T

sample

, the temperature change of the metal sample when it came

into contact with the water. Record your results in Table 2.1.

water

= M

total

- (M

cal

+ M

sample

)

∆T

water

= T

final

- T

cool

∆T

sample

= 100° C - T

final

From the law of energy conservation, the heat lost by the metal sample must equal the heat

gained by the water:

Heat lost by sample = (M

sample

) (c

sample

) (∆T

sample

) = (M

water

) (c

water

) (∆T

water

) = Heat gained by water

water

is the specific heat of water, which is 1.0 cal/g K.

Use the above equation, and your collected data, to solve for the specific heats of alumi-

num, copper, and lead. Record your results in the bottom row of Table 2.1.

Table 2.1: Data and Calculations (Part 1)

Trial 1 Trial 2 Trial 3

cal

sample

cool

final

total

water

∆T

water

∆T

sample

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Commentaires sur ces manuels

Pas de commentaire

Pasco TD-8557 Basic Calorimetry Set Manuel d'utilisateur Page 8

Commentaires sur ces manuels

Produits connexes et manuels pour Équipement Pasco TD-8557 Basic Calorimetry Set