How many joules are required to heat 200. grams of water from 25.0 ⁰C to 100. ⁰C?

If a substance is an element, what else must be true about it is :

It is found in the periodic tables

Explanation:

Substance : It is pure form of the matter . It can not be further divided into other particles.

Element : It is the simplest form of matter . The element consists of particles of the same kind of atoms .

Example: The Fe is the iron element and it contains only iron atoms .

Compounds : When two or more element react together in a fixed ratio , The compound is formed .So compound is the mixture of elements.

Elements Properties:

Different elements have different properties . Some are solid , some are liquid or gases at room temperature . For example Sodium is solid but mercury is liquid at room temperature.Depending upon element , it can have definite shape or volume The element can not be further divided by any physical or chemical process.It contain only one kind of atoms

So  true statement is :

It is made of only one type of atom