Answer : The amount of heat released is, -1602.36 KJ
Explanation : Given,
Moles of NaOH = 3.600 mole
Molar heat of solution of NaOH = -445.1 KJ/mole
Now we have to calculate the amount of heat released.
As, 1 mole of NaOH is dissolved in water then heat released = - 445.1 KJ
So, 3.600 mole of NaOH is dissolved in water then heat released =
Therefore, the amount of heat released is, -1602.36 KJ
Answer:
1.99 x 10²³ formula units
Explanation:
Given parameters:
Mass of AgF = 42.15g
Unknown:
The amount of formula units
Solution:
To solve this problem, we set out by find the number of moles in this compound from the given mass.
Number of moles =
molar mass of AgF = 107.9 + 19 = 126.9g/mol
Number of moles = = 0.33 moles
1 mole of a substance = 6.02 x 10²³ formula units
0.33 moles of AgF = 0.33 x 6.02 x 10²³ = 1.99 x 10²³ formula units
Answer: The enthalpy of formation of is -396 kJ/mol
Explanation:
Calculating the enthalpy of formation of
The chemical equation for the combustion of propane follows:
The equation for the enthalpy change of the above reaction is:
We are given:
Putting values in above equation, we get:
The enthalpy of formation of is -396 kJ/mol