The equation for synthesis of the poisonous gas COCl2 is
CO(g) + Cl2(g)COCl2
If 43.2 kJ of energy is evolved when 39.5 g of COCl2 is synthesized, what is the molar enthalpy for this synthesis?
THANK YOU!
43.2/39.2*98.91=108.2
You're welcome! Now, let's tackle that question with a little bit of a twist. Imagine if COCl2 was a stand-up comedian, its molar enthalpy would be its punchline!
To find the molar enthalpy, we need to first convert the mass of COCl2 into moles. We can use the molar mass of COCl2 to do that. Just take the molar mass and divide it by the mass of COCl2:
Molar mass of COCl2 = (1 x atomic mass of C) + (1 x atomic mass of O) + (2 x atomic mass of Cl)
Once we have the number of moles of COCl2, we can use the balanced equation to determine the moles of CO and Cl2. From there, we can calculate the change in enthalpy using the given energy evolved (43.2 kJ).
So, by taking a comedic twist on this problem, we can find the molar enthalpy of the synthesis reaction and have a good laugh along the way! Keep those chemistry jokes rolling!
To find the molar enthalpy for the synthesis of COCl2, we can use the given energy change and the amount of COCl2 produced.
Step 1: Calculate the moles of COCl2 produced.
To do this, we need to convert the given mass of COCl2 to moles using its molar mass. The molar mass of COCl2 is the sum of the atomic masses of carbon (C), oxygen (O), and chlorine (Cl).
C: 1 * 12.01 g/mol = 12.01 g/mol
O: 1 * 16.00 g/mol = 16.00 g/mol
Cl: 2 * 35.45 g/mol = 70.90 g/mol
Molar mass of COCl2 = 12.01 + 16.00 + 70.90 = 98.91 g/mol
Moles of COCl2 = mass / molar mass = 39.5 g / 98.91 g/mol
Step 2: Calculate the energy change per mole of COCl2.
The energy change given is in kJ, so we need to convert it to joules (J) by multiplying by 1000.
Energy change = 43.2 kJ * 1000 = 43,200 J
Energy change per mole of COCl2 = Energy change / moles of COCl2
Step 3: Calculate the molar enthalpy.
The molar enthalpy is defined as the energy change per mole of the substance involved. In this case, the molar enthalpy is the same as the energy change per mole of COCl2 synthesized.
Molar enthalpy = Energy change per mole of COCl2
Now you can substitute the known values and calculate the molar enthalpy.
To find the molar enthalpy for this synthesis, we need to first determine the number of moles of COCl2 in the reaction.
Step 1: Calculate the number of moles of COCl2
To find the number of moles, we need to use the molar mass of COCl2, which is the sum of the atomic masses of carbon (C), oxygen (O), and two chlorine (Cl) atoms.
The atomic masses are:
C: 12.01 g/mol
O: 16.00 g/mol
Cl: 35.45 g/mol
Molar mass of COCl2 = (12.01 + 16.00 + 35.45 + 35.45) g/mol = 98.91 g/mol
Number of moles of COCl2 = mass of COCl2 / molar mass of COCl2
= 39.5 g / 98.91 g/mol
Step 2: Calculate the molar enthalpy
Molar enthalpy is defined as the energy change per mole of a substance. In this case, the energy evolved is given as -43.2 kJ.
Molar enthalpy = Energy change / Number of moles
Molar enthalpy = -43.2 kJ / (39.5 g / 98.91 g/mol)
Now, we can perform the calculation to find the molar enthalpy.
YOu have to figure the molar mass of COCl2
then
molarenthalpy=43.2Kj* 39.2/molmass