Science Thermique/ Thermodynamique

Adiabatic change

Comparison of different types of solaire collectors

Principle

A collector test field can be used to investigate the temperature response of four differently designed solar collectors. It also demonstrates the effect of the absorber's colour, of heat insulation and covering of the glass. Measurements are made simultan ...

Conversion of radiating energy into électric energy

Principle

A 2-V motor can be driven with the help of a solar battery with four cells connected in series. It is particularly impressive if it is not only used to turn a lightweight disc, but to drive a heavy vehicle.

Thermal equilibrium

Principle

Why do tea or coffee get cold onstanding, but never hot?

Tasks

Watch the water temperatures when a vessel containing cold water is dipped into a hot water bath.

We 2.5 Dilatation de solides

Principle

Metal tubes are heated with steam. The linear expansion of three different metals is determined with the aid of a rotating-shaft pointer. From this the metals' coefficient of linear expansion is determined (Supplementary problem). The use of a rolling ...

We 3.2 Coefficient de conduction de chaleur de métaux

Principle

One end of a U-shaped metal rod is immersed in boiling water and the other in cold water. From the warming of the cold water qualitative and quantitative statements can be made about the influence of the rod's composition, length and diameter on the h ...

We 3.5 Absorption du rayonnement thermique

Principle

A polished and a black beaker are heated by radiation. Instead of solar radiation a bright flame located in front of the two beakers is used.
Both beakers are filled with air since the heat capacity of water is very large and it would be too sl ...

Thermal insulation

Principle

A quick loss of heat is sometimes not wanted. What can be done to keep the temperature in a vessel
constant?

Tasks

Measure the cooling of hot water in two different environments:

• In a glass b ...

Heating of water

Principle

How depends the time required to heat up water on the amount of water when a defined heating source is available?

Tasks

Heat up various amounts of water with an electric heating coil and measure the time dependence ...

Heating of various liquids

Principle

Do different liquids heat up to the same extent when subject to the same heating?

Tasks

Heat 100 g and 100 ml of water and of glycerol with an electric heating coil and measure the temperature
in dependence o ...

We 4.3 Chaleur massique de l'eau

Principle

A measured quantity of water is heated with a heating coil. The electrical heat output is determined. From the temperature increase and the heat energy, the specific heat capacity of water is calculated. This calculation is performed under point 6 of ...

Specific heat capacity of water

Principle

In households, a great amount of energy is used to heat up water - for showers, for washing clothes, for cooking. Exactly how much is necessary for each degree that each mililitre of water is warmed up? How are amount of heat, heat capacity and change ...

Temperature of mixtures and heat capacity of the calorimètre

Principle

Quantities of heat distribute themselves so that finally all parts that are in contact with each other have the same temperature. If the heat capacities and the initial temperatures are known, then the final temperature can be predicted. Or, in rever ...

Specific heat capacity of métals

Principle

The calorimeter can be used to determinethe heat content of a piece of metal.The heat content can be calculated fromthe mixing temperature that is reachedin the calorimeter.

Tasks

Heat up metal bodies of the same ma ...

Calorimetric temperature measurement

Principle

Calorimetry can also be used to determine the temperature of a hot object that is difficult to measured by any other method, e.g. because it is too hot for the thermometers available. The heatcontent of the object can be calculated from the mixture t ...