Data Collection

Table 1. Mass of object(s) before heating the popcorn.

Table 2. Measurements made during the displacement of unpopped corn.

Table 3. Mass of object(s) after heating the popcorn.

Qualitative Data

Table 4. Qualitative observations of the corn before and after heating.

Sample Calculations

Mass of unpopped kernels

Corn and weighing cup- weighing cup

= 27.48g - 25.20g

= 2.34g

Error Propagation of Addition and Subtraction

ΔZ = [(Δx2) + (Δy2)]

ΔZ= error propagation

Δx= value 1 uncertainty

 Δy = value 2 uncertainty

Mass of unpopped kernels

= [(0.01)2 + (0.01)2]

= (0.0l2 + 0.0l2)

= 0.0002

 0.01414

 0.01 g

Mass of popped kernels

Mass of flask, oil and popped corn – Flask and oil

= 105.43g- 103.40g

= 2.03g

Volume of popcorn

Volume of water and corn- volume of water

= 6.80mL- 4.90mL

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=1.90mL

Volume of popcorn in litres

 = (Volume of popcorn in ml) / 1000

 = (1.9 ml ± 0.01 ml) / 1000

= 0.0019 L

Mass of Water Lost

Mass of flask, oil, and unpopped popcorn- Mass of flask oil and popped popcorn

105.74g - 105.43g

= 0.310g

Moles of water lost

moles =   Mass of water

             Molar mass of water

n= 0.31g

  18.01g/mol

=0.0172 mol

Percent water in kernel

Mass of water lost  x 100

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