The correct answer is true and first.
The statement is true. According to the first law of thermodynamics.
Energy is termed as quantitative property which is transferred to an object so as to heat. Energy cannot be destroyed or created but it can be converted to a form of an object.
There are different forms of energy. For example, kinetic energy which is a moving object, elastic energy which is got by stretching solid objects and stored, chemical energy which is released when fuel is burned.
Inorder for living organisms to stay alive they should have available energy. For example, human gets energy from food. Radiant energy drives ecosystem and earth's climate whereby the earth receives it from geothermal energy and sun.
Sample could get contaminated with an acid. because vinegar contains acetic acid.Acetic acid is the second simplest carboxylic acid (after formic acid) and consists of two small functional groups, an acetyl group (sometimes symbolized as Ac) and a hydroxyl group (AcOH); it can also be viewed as a methyl group and a carboxyl group linked. It is an important chemical reagent and industrial chemical
Answer:
Chemical properties are very useful in identifying substances. However, unlike physical properties, chemical properties can only be observed as the substance is in the process of being changed into a different substance.
