What is relative humidity of a sample of air that has a dry bulb temperature of 20 and a wet bulb temperature of 11

Relative humidity of a sample is 31%

Explanation:

Difference in temperature = dry bulb - wet bulb

= 20 -11

= 9

Look at the table for :

= 9 and T(dry) = 20

Relative Humidity : It is ratio of actual mass of water vapour in a given moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure. It is written as RH.

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