Page 146 - York Global Science 6 - Physical Science
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These two containers also contain the same substance. The temperatures are
the same, but the heat energy is higher in container B.
The temperature of the two substances is the same. However, there is a
bigger mass in container B. This means that there is a higher number of
particles in total, so more particles are moving because of kinetic energy.
A thermometer does not give an accurate representation of the total amount
of kinetic energy; it measures the average kinetic energy of the particles.
The specific heat capacity of a substance also affects how quickly the
temperature changes. Different materials need different amounts of heat
energy to raise the temperature of a specific unit of mass by 1°C.
The specific heat capacity of water is 4182 J/kg/°C.
This means that to raise the temperature of a kilogram of water by 1°C, you
need 4182 joules of energy.
Other materials may need more or less energy to increase the temperature
by 1°C.
Find Out!
Find out the heat capacities of different materials.
Which materials need more energy than water to raise the temperature by
1°C?
Which materials need less energy than water to raise the temperature by 1°C?
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