During a very cold winter, water pipes sometimes burst. The reason for this is______________
The ground contracts when colder, pulling pipes apart.
Water expands when freezing.
Water contracts when freezing.
The freezing process releases pressure on the pipes.
Which of the following expands most when the temperature is increased? Equal volumes of_______________
Helium.
Iron.
Wood
Ice water
12.9 gram of an unknown metal at 26.5oC is placed in a cup containing 50.0 grams of water at 88.6oC. The water cools down and the metal warms up until thermal equilibrium is achieved at 87.1oC. Assuming all the heat lost by the water is gained by the metal and that the cup is perfectly insulated, determine the specific heat capacity of all the unknown metal. Sp. heat of water = 4.18 J/g/oC
2.49 J/g/oC
0.40J/g/oC
0.39J/g/oC
2.56J/g/oC
___________________is a process of transformation directly from solid phase to the gaseous phase without passing through an liquid phase.
Condensation.
Deposition
Sublimation
Vaporization
The relation between α : β : γ is _______________.
2: 3 : 1
1: 2: 3
2 : 1: 3
3 : 2 : 1
Suppose you put a closed, sealed can of air on a hot stove burner. The contained air will undergo an increase in_______________
Pressure
Internal energy.
Temperature.
Temperature, pressure and internal energy .
The food in a refrigerator is cooled by__________________
Vaporization of the refrigerating fluid.
Condensation of the refrigerating fluid.
The ice in your nearby freezer.
Liquidation of the refrigerating fluid
Before ice can form on a lake, all the water in the lake must be cooled to_____________
4oC
0oC
A value slightly below 0oC
None of the above are true. Ice can form at the surface regardless of the water temperature below.
To melt 50 grams of 00C ice requires______________of heat
80 calories
25 calories
50 calories
4000 calories
When you touch a cold piece of ice with your finger, energy flows______________
From the ice to your finger
From your finger to the ice
Actually both way
From surroundings.
