Consider the reactions represented by the following net ionic equations: 1. CaH2(s) 2H2O(l) rightwards arrow with blank on top Ca(OH)2(s) 2H2(g) 2. HCO3-(aq) H3O (aq) rightwards arrow with blank on top CO2(g) 2H2O(l) 3. H3O (aq) OH-(aq) rightwards arrow with blank on top 2H2O(l) Which of the reactions would be classified as acid-base reactions

the answer is   c.) 1575 j.

explanation:

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put the answers   and i could answer.

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