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BIG NEEDS MOREBIG NEEDS MORE
HEAT CAPACITY
Scientific ConceptScientific Concept
• Heat capacity of an object is the amount of heat required to increase the temperature of the object by 1oC
• Larger mass has larger heat capacity
ENGAGEENGAGE
After heating both of soups for two minutes, which one is hotter?
EMPOWEREMPOWERPlanning and Doing Experiment – Observation of change in temperature when the same amount of heat is used to heat different mass of water
Temperature sensor
Temperature sensor
EMPOWEREMPOWERResults
Time ( s ) Temperature ( °C ) Time ( s ) Temperature ( °C )
100g 200g 100g 200g
0 27.837 27.188 310 69.366 42.196
10 28.426 28.124 320 70.951 42.446
20 29.891 30.291 330 71.763 42.756
30 31.779 31.230 340 72.906 43.092
40 34.187 28.589 350 74.283 43.251
50 32.872 29.005 360 75.031 43.740
60 34.357 29.949 370 76.872 44.110
70 35.487 30.099 380 84.475 45.545
80 39.636 30.547 390 78.956 45.863
90 40.916 32.469 400 79.146 47.220
100 41.263 31.696 410 80.122 47.150
110 41.847 31.991 420 81.171 47.090
120 43.189 32.962 430 81.806 47.550
130 44.752 33.526 440 85.577 47.950140 46.172 33.696 450 90.656 48.300
150 50.518 34.125 460 90.153 48.920
160 49.533 34.333 470 92.832 48.510
170 53.350 34.876 480 93.192 50.210
180 54.817 35.473 490 93.602 49.980
190 57.517 36.812 500 92.817 51.000
200 58.266 37.034 510 93.682 50.320
210 61.019 36.889 520 91.752 51.100
220 59.846 37.439 530 92.888 51.460
230 59.101 38.462 540 93.217 52.520
240 59.126 38.609 550 94.819 52.880
250 60.709 38.906 560 96.128 53.230
260 62.138 39.576 570 94.844 52.980
270 66.071 40.226 580 95.386 53.800
280 68.434 41.442 590 95.687 54.340
290 67.821 40.868 600 96.201 54.700
300 69.720 41.722
EMPOWEREMPOWER
100g of Water100g of Water
200g of Water200g of Water
Results
EMPOWEREMPOWER
1. What happened to the temperature during
heating these water?
2. From the graph, which one of the water has the
higher rate of temperature increase?
3. Why the water have difference rate of
temperature increase?
4. Which one of the water has the higher heat
capacity?
Discussions
ENHANCEENHANCE
A 3-years old boy was burn after falling onto a hot curry placed by his mother on the floor. Why this incident happened?
UNIQUE FEATURE OF THIS ACTIVITYUNIQUE FEATURE OF THIS ACTIVITY
Both of water with different mass
can be conducted at the same time
Both of water with different mass
can be conducted at the same time
The graphs can be plotted easily and save time
The graphs can be plotted easily and save time
Student can avoid reading error and they
can get the accurate data
Student can avoid reading error and they
can get the accurate data
Encourage students’ interest in
practical work
Encourage students’ interest in
practical work
Data can be taken although temperature rise very fast
Data can be taken although temperature rise very fast
