Identify, which is not correct from the diagram Select one: O a. 2-3 and 4-1 = constant pressure process O b. 1-2.2-3,3-4,4-1= path O . 1-2-3-4-1= Cyclic process O d. 1-2 and 3-4= constant Temperature process

Q: A piston cylinder device is fitted with stops at the top. Initially .5lbs of R-134a is in the tank…

A:

Q: Question B3 The engine of an aeroplane is equipped with an ideal convergent nozzle with an area…

A:

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.