Aballoon is filled with helium gas. what will happen as the average kinetic energy of the helium particles increases?

the balloon will decrease in total volume.
the temperature of the balloon will decrease.
the gas atoms will strike the sides of the balloon more often.
the gas inside the balloon will change into a liquid.

1 a

2 d

3 a

4 c

explanation:

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