Question

a Copy and complete the table of results
d Can you suggest any improvements to the
b Add a further column and include the energy value apparatus so that the students' value might be
of the peanut in kj per g.
closer to the professional one (245 kJ per g)?
C Calculate the mean energy value of the peanut as
Redraw the apparatus showing your suggestions.
found by these students. Why is the mean value e What features of the method helped to improve the
more valid than any single value that they
validity of the results? How could the students have
obtained?
treated the results differently to improve their
validity further?
T, 1°C T, 1°C T-T, 1°C Volume of Energy transferred Mass of nut/g Energy value !
water 1 cm to water / kcal
3
kcal per g
22
78
0.45
22
74
0.52
21
75
0.47

Answer 1

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