Question 2 (1 point)
A gas at 150.kPa and 150.K has an initial volume of 4.00 L. The pressure of the gas increased to 300.kPa as volume increases to 6.00 L. What is the new temperature in degrees Celcius?

they are both synthetic elements

explanation:

d

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