The energy input and work output (per cycle) for two different heat engines is recorded in this table. Which statement is true about the two engines?

A)
Engine I wastes 0.4 kJ more energy than Engine II.
B)
Engine Il wastes 0.4 kJ more energy than Engine I.
Engine I wastes 0.6 kJ more energy than Engine II.
D)
Engine II wastes 0.6 kJ more energy than Engine I.

gravity causes stares to cluster i think so

може ли да зареждате повече информация, моля

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