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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.
A quick loss of heat is sometimes not wanted. What can be done to keep the temperature in a vessel constant?
Measure the cooling of hot water in two different environments:
How depends the time required to heat up water on the amount of water when a defined heating source is available?
Heat up various amounts of water with an electric heating coil and measure the time dependence ...
Do different liquids heat up to the same extent when subject to the same heating?
Heat 100 g and 100 ml of water and of glycerol with an electric heating coil and measure the temperature in dependence o ...
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 ...
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 ...
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.
Heat up metal bodies of the same ma ...
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 ...
Different forms of energy can be converted into each other. Here the potential energy of steel pellets is converted to heat when falling pellets collide.
Let the pellets dro ...
Drinks can be cooled by putting the bottle in a moist sock and letting the sock dry. The same process occurs when our bodies are cooled by sweating. The change in temperature that occurs is to be examined in this experiment.
Cold water is filled in a calorimeter and heated with a heating coil. The relation between the heating power and the temperature increase and also the specific heat capacity of water are determined.
Water is filled in a beaker, heated to boiling with a heating coil and partly evaporated. The specific heat of evaporation is determined from the measured heating power and the evaporated mass of water.
Glycerol and hot water are mixed in a calorimeter at room temperature and the mixing temperature is measured. The specific heat capacity of glycerol can be determined from the values so obtained and the temperatures of the liquids prior to mixing the ...
The ideal gas equation describes the thermal state of an enclosed gas with regard to the parameters of state; pressure p, volume V, temperature T and number of gas molecules n. It enables three different gas laws to be derived, each for the behaviour ...
The ideal gas law describes the thermal state of the gas enclosed in a vessel relative to the properties pressure p, volume V, temperature T, and amount of substance n. It can be used to derive three different laws which describe how a gas behav ...
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