Agas mixture with 4 mol of ar, x moles of ne, and y moles
ofxe is prepared at a pressure of 1 bar and a temperature of
298k. the total number of moles in the mixture is three times thatof
ar. write an expression for the deltagmixing in termsof
x. at what value of x does the magnitude ofdeltagmixing
have its maximum value? calculatedeltagmixing for this
value of x.

a)

b)

c)

Explanation:

Gas mixture:

Mol fractions:

Expression of

Expression of

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.