Areagent bottle (labelled) is filled with hcl solution and the other (labelled as b) is filled with water. both liquids in the bottle are colourless. what method do you recommend to identify the acid and water?

There are several methods - look at the explanation.

Explanation:

So first you can use cobal chloride paper which turns from blue to pink when water is present or you can use anhydrous copper sulfate which turns from white to blue and the blue substance would be called hydrated copper sulfate which is formed when water and anhydrous copper sulfate mix.

introduction of a drug directly into the respiratory tract is a form of inhalation administration.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.