Answer:
increasing its temperature
using a longer wire
using a thinner wire
Answer: Option (c) is the correct answer.
Explanation:
Boiling point is defined as the point at which vapor pressure of a liquid becomes equal to the atmospheric pressure.
Boiling point of water is 
.
Whereas when we heat one mole of a liquid at its boiling point without any change in temperature then the heat required to bring out change from liquid to vapor state is known as heat of vaporization.
Thus, we can conclude that the heat of vaporization of water is the amount of heat/energy required to convert 1 gram of liquid water at to 1 gram of steam at .
Hard water contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates. Ferrous ion may also be present;
<u>Explanation</u>:
- Hard water contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates. Ferrous ion may also be present; oxidized to the ferric form. It appears as a reddish brown stain on washed fabrics and enameled surfaces.
- Water hardness that is caused by calcium bicarbonates is known as temporary, because boiling converts the bicarbonates to the insoluble carbonates; hardness from other salts is called permanent.
- Calcium and magnesium ions in hard water react with the higher fatty acids off soap to form an insoluble gelatinous curd, thereby causing a waste of the soap.
A chemical formula represents a compound, like NaCl (table salt). A chemical equation shows two or more elements or compounds combining to create a product, like Na+Cl -> NaCl
