air at a dry ball temperature of 80 degrees C and 4% RH is passed over the cooling coil so that the temperature of the air dry ball becomes 35 degrees Celsius. how much heat is released from the air in the process? (answer in kj / kg)

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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.