When 0.243 g of mg metal is combined with enough hcl to make 100 ml of solution in a constant-pressure calorimeter, the following reaction occurs: mg1s2+2 hcl1aq2¡mgcl21aq2+h21g2if the temperature of the solution increases from 23.0 to 34.1 °c as a result of this reaction, calculate ∆h in kj> mol mg. assume that the solution has a specific heat of 4.18 j> g@°c and

Explanation:

We have to start with the balance reaction:

Now we have to keep in mind the heat equation:

ΔT

Where:

Q=heat

m= Mass

ΔT= Tfinal-Tinitial

Cp= 4.18

Calculation of mass: We have to use the density of water

Calculation of ΔT:

ΔT = 34.1-23.0= 11.1 ºC

Now, we can calculate Q:

To get the final answer we must find the moles of , so:

With the heat and the moles we have calculate the KJ/mol:

the correct answer is:

a. formation of precipitation

може ли да зареждате повече информация, моля