Consider the following reaction: hc2h3o2(aq)+h2o(l)⇌h3o+(aq)+c2h3o−2 (aq) kc=1.8×10−5 at 25∘c
1.if a solution initially contains 0.260 m hc2h3o2, what is the equilibrium concentration of h3o+ at 25∘c?
consider the following reaction: so2cl2(g)⇌so2(g)+cl2(g) kc=2.99×10−7 at 227∘c
2.if a reaction mixture initially contains 0.150 m so2cl2, what is the equilibrium concentration of cl2 at 227 ∘c?

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol