As equações: I) CaO + CO2 -> CaCO3

II) 2 AgCℓ -> 2 Ag0 + Cℓ2

são, respectivamente, reações de:

a.
análise e deslocamento.

b.
síntese e análise.

c.
síntese e dupla troca.

d.
análise e síntese.

e.
análise e deslocamento.

As equações: I) CaO + CO2 → CaCO3 II) 2 AgCℓ → 2 Ag0 + Cℓ2 são, respectivamente, reações de: A) análise e deslocamento… ... D) síntese e dupla troca. 1 ... 1 – Dada a fórmula molecular dos compostos faça a fórmula eletrônica e a estrutural para os mesmos: a) HNO2 b) HIO3 c) H3PO4 2 – Um metal ...

1 answer

Explanation:

please brainleast

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