Hòa tan 5,6g FE vào 200g dung dịch HCL thu được FECL2 và H2 a)tính VH2(ĐKC)
b)tính C% của dung dịch thu được

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

the answer is na (sodium)

is there any options? maybe im just not seeing them but i need the options to

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idk what is it? is this a question that you know the answer or u dont