A 250.0 mL bag of chips initially found at 21.0°C is left in a hot car and heated to 65.0°C. What is the new volume of the bag?

V'/T'=V"/T"

V"=(250/294)×338

   =287.41 ml

Explanation:

the correct answer is:

a. formation of precipitation

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