1point
how might a chef use chemistry?
o
a. chemistry can a chef understand how to combine different
ingredients in a recipe.
o
b. chemistry can a chef understand how to present food
artistically
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c. chemistry can a chef understand which recipes are healthy.
d. chemistry can a chef understand how heat is transferred in
ovens.
submit

the answer is d.) potassium

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