Answer:
The difference in the observed temperature of measurement of the material and their apparent temperature when touched by hand is due to their relative higher affinity for heat. As such aluminum with a lower heat capacity or higher affinity or transmission ability for heat than the hand will feel cool when touched.
The materials have different specific heat capacity or heat affinity which is a measure of their ability to quickly take on the temperature of their surroundings, in this case their ability to conduct heat energy relative to the hand
Explanation:
The aluminium with specific heat capacity of 0.900 J/gm K requires very little heat to cause a temperature change compared to a wood with a specific heat capacity of 1.76 J/gm K such that when one touches a piece of aluminium, the aluminium quickly raises its temperature by absorbing heat from the hand which is observed as it (the aluminium), being cold. The same can be said of the paper towel
The relationship is
Heat loss or gain = mass × specific heat capacity × temperature change
In other words, aluminium has a higher affinity for heat than either the hand or wood
So, for compound with composition <span>NH3O</span> the correct structure would be <span>H2N−OH</span><span>. The structure of second type is stable for compound </span><span>NOF3</span> and may be observed for amine oxides like (C2H5)3N→O<span> or pyridine-N-oxide.
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Answer:
D) the electric energy changes into light and heat energy and is not destroyed
Explanation:
Energy can not be created or destroyed
Answer: The chemical equations are given below.
Explanation:
A balanced chemical reaction follows law of conservation of mass.
This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form. This also means that total number of individual atoms on reactant side must be equal to the total number of individual atoms on the product side.
Single displacement reaction is defined as the reaction in which more reactive metal displaces a less reactive metal from its chemical reaction.
General equation representing single displacement reaction follows:
C is more reactive element than element A.
The reactivity of metals is judged by the series known as reactivity series. Elements lying above in the series are more reactive than the elements lying below in the series.
- 1. When solid lead metal is put in the beaker of 0.043 M
solution.
Lead lies below in the reactivity series than iron. Thus, it will not replace iron from its chemical reaction.
- 2. When solid iron metal is put in the beaker of 0.044 M
solution.
Iron lies above in the reactivity series than lead. Thus, it will easily replace lead from its chemical reaction.
Hence, the chemical equations are given above.
