Vil) acetylene gas undergo ozonolysis reaction? ENGINEERING CHEMISTRY
Examination 2070 R/B
Full marks: 60
me: 3 hrs
Pass marks: 24
ndidates are required to give their answers in their oum words as far as practicable.
tempt All questions
a) What is meant by hardness of water? Why is hard water not suitable
for washing purpose? Describe the sodium permutit process to remove
the hardness of water
[1+13
b) Describe with a neat sketch how is ammonia manufactured by Haber's
process? What happen with ammonia reacts with heated sodium? [4+1
a) Define pollution and pollutants. Discuss the effects of CO, SO, and
15
11.no​

can you list the answers so i can answer

they are all solids.

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