Chemistry: The molar mass of a compound is approximately 56 g mol ^-1. Which formula is possible for this compound?

Answer : The heat of this reaction of AgCI formed will be, 66.88 KJExplanation :First we have to calculate the heat of the reaction.where,q = amount of heat = ? = specific heat capacity = m = mass of substance = 120 g = final temperature = = initial temperature = Now put all the given values in the above formula, we get:Now we have to calculate the number of moles of and .Now we have to calculate the limiting reactant.The balanced chemical reaction will be,As, 1 mole of react with 1 mole of HClSo,...

The molar mass of a compound is approximately

Ответ:

Amholloway13

09.02.2020

Chemistry

Answer : The heat of this reaction of AgCI formed will be, 66.88 KJ

Explanation :

First we have to calculate the heat of the reaction.

$q=m\times c\times (T_{final}-T_{initial})$

where,

q = amount of heat = ?

= specific heat capacity = 4.18J/g.K

m = mass of substance = 120 g

$T_{final}$ = final temperature = 22^oC=273+22=295K

$T_{initial}$ = initial temperature = 22.8^oC=273+22.8=295.8K

Now put all the given values in the above formula, we get:

$q=120g\times 4.18J/g.K\times (295.8-295)K$

q=401.28J

Now we have to calculate the number of moles of AgNO_3 and HCl .

$\text{Moles of }AgNO_3=\text{Molarity of }AgNO_3\times \text{Volume of solution}$

$\text{Moles of }AgNO_3=0.20mole/L\times 0.03L=0.006mole$

$\text{Moles of }HCl=\text{Molarity of }HCl\times \text{Volume of solution}$

$\text{Moles of }HCl=0.10mole/L\times 0.1L=0.01mole$

Now we have to calculate the limiting reactant.

The balanced chemical reaction will be,

$AgNO_3+HCl\rightarrow AgCl+HNO_3$

As, 1 mole of AgNO_3 react with 1 mole of HCl

So, 0.006 mole of AgNO_3 react with 0.006 mole of HCl

From this we conclude that, HCl is an excess reagent because the given moles are greater than the required moles and AgNO_3 is a limiting reagent and it limits the formation of product.

Now we have to calculate the moles of AgCl.

The given balanced reaction is,

$Ag^++Cl^-\rightarrow AgCl$