Which symbol equation correctly describes the reaction: Wood (mostly glucose) burns in the presence of oxygen to form water and carbon dioxide? A. C6H12O6 + O2 + H2O + CO2 B. CH1206 → 02 + H2O + CO2 C. 02 + H2O + CO2 + C6H1206 D. O2 + H2O + CO2 + C6H1206

the right answer is c i just did the question.

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