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WorksheetsFORM 4 PHYSICS : C4 HEAT
Total questions: 20
Worksheet time: 16mins
Which of the following statement is true about the scale of temperature, Kelvin.
It is the S.I unit for temperature
The absolute temperature is equal to freezing point of water
Boiling water temperature is 100K
The quantity of heat energy is measured using ______________ unit.
Kelvin
Joule
Celsius
energy
What is thermal equilibrium?
a phenomena when two objects in thermal contact reach the same temperature
a phenomena when two objects in thermal contact reach the same temperature and the net heat flow between the objects is zero
objects transfer heat to have a lower temperature
For a clinical thermometer thermometer the range of temperature is between
35 C to 42 C
32 C to 45 C
30 C to 48 C
10 C to 40 C
State three properties of mercury used that make it suitable to use as the liquid in the liquid-in-glass thermometer
it is opaque
it sticks to to the glass wall
it does not sticks to the glass wall
it has very low freezing point
it expands uniformly when heated
The volume of Helium gas in a balloon at room temperature of 30°C is 200 cm3. At what temperature would the volume of the balloon increases by another 10 cm3, assuming that the gas pressure is kept constant. give the answer in degree celcius
45.15
451
5.51
315.5
What is the amount of heat supplied by a water heater to change 0.75kg of water at 30°C to steam at 100°C ?
[specific heat capacity of water is 4200J Kg -1 0C-1 ]
[ specific latent heat of vaporisation is 2.26 X 10 6 J kg -1]
1.82 X 106 J
1.92 X 106 J
1.72 X 106 J
When the state of matter is changing from gas to liquid heat energy is
released
absorbed
constant
During Condensation latent heat is ____________________ and molecular bond is ______________________
absorbed , broken
released , formed
released , broken
absorbed , formed
20g of boiling water at 100°C is poured into a glass containing 200g of water at 28°C . Calculate the final temperature of the mixture of water.
35.45°C
43.55°C
34.55°C
________________________________ is the quantity of heat, Q that is absorbed or released during a change of phase of 1kg of substance without any change in its temperature
latent heat
specific latent heat
specific latent heat of fusion
specific latent heat of vaporisation
Air in a closed syringe has a volume of 40cm3, and pressure of 110kPa. The piston of the syringe is pushed to compress the air to a volume of 30cm3. Calculate the pressure of the compressed air
166.67Kpa
167.67Kpa
146.67Kpa
156.67Kpa
Based on the graph given
volume is directly proportional to the absolute temperature
volume is directly proportional to the temperature
volume is linearly proportional to the temperature
volume is inversely proportional to the temperature
An air bubble has a volume of 0.2 cm3 at a depth of 20m below the sea surface. what is the volume of the air bubble at the sea water surface. Atmospheric air pressure is 10mwater at the sea surface.
0.3cm3
0.4cm3
0.5cm3
0.6cm3
A gas in a closed steel cylinder has a pressure of 200KPa at a temperature of 300C. What is the gas pressure when the cylinder is heated to a temperature of 600C?
218.9KPa
298.1Kpa
201.8Kpa
219.8KPa
Gay Lussac's Law states that pressure is directly proportional to temperature of a fixed mass of gas at constant temperature
false
true
When energy is transferred from a high temperature region to a low temperature region heat energy is transferred
false
true
A 1000W electric heater is used to melt 2kg of ice. what is the time taken to melt the ice?
[ specific latent heat of fusion = 336000jKg-1 ]
677s
672s
772s
726s
An object with a big C, specific heat capacity is a
good conductor of heat
poor conductor of heat
An increase in temperature of an object shows the particles of the object
shows an increase in the average kinetic energy of the particles
shows a decrease in the average kinetic energy of the particles
no changes in the average kinetic energy
