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ENERGY BOOSTER !!!
GROUP MEMBERS:
INTAN NURULAMALINA BT AHMAD SAPAR (M20131000655)
NOOR HANANI BINTI ROSLAN (M20122001557)
SALINATUL SAADIAH BT SAAT (M20131000622)SITI MAISARAH BT MOHAMED SUFIAN (M20131000620)
SITI ROHANI BT MAT LAZIM (M20131000624)
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BACKGROUND INFORMATION
Food is a source of energy.
Energy is stored in the chemical bonds of carbohydrates, fats, andproteins in food.
The energy value of food is defined as the energy produced when1 gram of food is completely burned.
Unit: (J/g) or (kJ/g).
When the food is burned, it releases most of its energy in the formof heat.
Energy value can be calculated by the following formula:
Energy value = mass of water (g) x temperature rise (C) x 4.2 J/g C
mass of food (g)
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ENGAGE
Figure above show 3 types of nuts. Rank the nuts accordingly in
ascending order energy level. Explain your answer.
.
Answer:
Cashew nutalmondgroundnut
Cashew nut has lower energy compared to almond and groundnut. While
groundnut has the highest energy value, because it is rich in protein
compared to others. Thus, it will provide more energy.
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EMPOWER
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PHOTOS
Experimental set up
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Results
Almond
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Continue
Cashew nut
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Continue
Groundnut
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Analysis
0.0
10.0
20.0
30.0
40.0
50.0
60.070.0
80.0
90.0
100.0
1 11 21 31 41 51 61 71 81 91 101
Temperature
The graph of Temperature against Time
Cashew nut Almond Groundnut
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Calculation
Energy value = mass of water (g) x temperature rise (C) x 4.2 J/g Cmass of food (g)
Type offood
Mass ofwater
(g)
Initial massof food
(g)
InitialTemperature
(C)
FinalTemperature
(C)
DifferentialTemperature
(C)
Calories
Value formass of food
used (J)
Calorie valuefor 1g of
food (J)
Cashew nut 10 0.561 24.564 86.129 61.565 8609.1 8,215.9
Almond 10 0.439 23.550 74.036 50.486 4830.1 11,002.5
Groundnut 10 0.200 23.144 43.144 20.000 4200.0 21,000.0
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Graph from spreadsheet
8215.9
11002.5
21000.0
0.0
5000.0
10000.0
15000.0
20000.0
25000.0
Cashew Nut Almond Ground Nut
Calorie value for 1g of food (J)
Calorie value for 1g of food (J)
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1) Based on your result, state your observations ontemperature reading during burning of food
sample?
2) Based on your calculation, which food sample has
the highest energy? Explain why?
3) What is the name of the process in living organisms
that released energy from food?
4) Write a word equation for this reaction. Is it thesame as the reaction used in the investigation?
Explain your answer?
5) What do living organisms do with the energy
released from their food?
Questions
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Answers1) Observations:
i. Temperature increases.
ii. The temperature of groundnut is changes from 23.1 O C to 43.1O C,
for cashew nut, changes from 24.5O C to 86.1O C and for almond,
changes from 23.1 O C to 74.0O C .
2) Groundnut because they rich in protein and fat compared to other food
samples that provide higher energy value.
3) The process in living organisms that release energy from food is called
respiration.
4) Carbohydrate + oxygencarbon dioxide + water
It is essentially the same reaction as that in the investigation, becauseboth reactions use oxygen and produce carbon dioxide.
5) Living organisms used the energy released from their food to make new
body tissues (growth and repair) and movement. Some of energy is
transfer to their surroundings as heat.
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ENHANCE
A student has decided to climb Gunung Jerai organized by his
school. This student only allowed to bring a type of food either
energy bar or instant noodle for that climbing. If you were him,
state your choice and explain why you choose that food.
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Answer
If I were that student, I will bring energy bar.
This is because it contains cereal, nut,
chocolate and milk which rich in carbohydrate,
protein and fat that have high calorie toprovide enough energy during climbing.
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Uniquefeatures
Avoid reading
error -getaccurate data
Data can be taken
althoughtemperature rises
very fast
Real time loggingwith graphspresented
simultaneouslywith data
collectionmethod