Please help me 14 point's If 1kg of the compound toluene melts at -950C, then 500g of toluene will
Group of answer choices

A) Boil at 95 0C

B) Freeze at -47.5 0C

C) Boil at 47.5 0C

D) Freeze at -95 0C

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