3. Trong một bình kín dung tích không đổi chứa 3 mol CO 2 và 0,5 mol CO. Đun nóng bình đến 298K, cân bằng C (r) + CO 2 (k)  2CO (k) được thiết lập có K P = 10 khi đó áp suất trong
bình là 1 atm. Tính áp suất của mỗi chất trong hệ lúc cân bằng.

fe 55.85 g/mol and h2o 18.02 g/mol.

im pretty sure its b

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