Read the prompt and study the diagram. What cause and effect prediction can be used to test the assumptions in the model? A)
with more sunlight the plant will produce less oxygen
B)
with more sunlight the plant will use less carbon dioxide
C)
with less sunlight more sugar will be produced by the plant
D)
with more sunlight more sugar will be produced by the plant

what does the table look like

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