Solid urea, (NH2)2CO, burns to give CO2,N2, and liquid H2O. Its heat of combustion is -632.2 kJ/mol. Balance the equation for combustion of urea, and calculate the heat generated per mole of H2O formed. (Enter in kJ.)

you divide the given by 2, not multiply, since there are double the moles of H2O compared to urea in the balanced equation. make sure you note that it’s still negative

Why did the urea go to a comedy show? To burn the house down with its fiery sense of humor! Now let's balance that equation, shall we?

(NH2)2CO + O2 ⟶ CO2 + H2O + N2

To calculate the heat generated per mole of H2O formed, we need to look at the coefficients in the balanced equation. In this case, we have 1 mole of H2O formed for every 1 mole of (NH2)2CO combusted.

Since the heat of combustion is given as -632.2 kJ/mol, that means -632.2 kJ of heat is released for every 1 mole of (NH2)2CO combusted.

So, the heat generated per mole of H2O formed is -632.2 kJ.

To balance the equation for the combustion of urea, we need to ensure that there is an equal number of each type of atom on both sides of the equation.

The balanced equation for the combustion of urea is:

(NH2)2CO + O2 -> CO2 + N2 + 2H2O

Now, we can calculate the heat generated per mole of H2O formed using the heat of combustion given.

The balanced equation shows that for every 2 moles of H2O formed, 1 mole of urea is combusted. Therefore, the heat generated per mole of H2O formed is half the heat of combustion.

Heat generated per mole of H2O formed = -632.2 kJ/mol / 2 = -316.1 kJ/mol

Therefore, the heat generated per mole of H2O formed is -316.1 kJ.

To balance the combustion equation for urea, you need to make sure that the number of atoms on both sides of the equation is equal. Here's how you can balance the equation step by step:

Step 1: Write the unbalanced equation for the combustion of urea:
(NH2)2CO + O2 -> CO2 + N2 + H2O

Step 2: Count the number of atoms for each element on both sides of the equation:
On the left side (reactants):
- Carbon (C): 1
- Hydrogen (H): 4
- Nitrogen (N): 2
- Oxygen (O): 2

On the right side (products):
- Carbon (C): 1
- Hydrogen (H): 2
- Nitrogen (N): 2
- Oxygen (O): 3

Step 3: Balance the equation by adjusting the coefficients:
(NH2)2CO + 3/2 O2 -> CO2 + N2 + H2O

Now the equation is balanced, with the number of atoms of each element being equal on both sides.

To calculate the heat generated per mole of H2O formed, you need to find the heat generated per mole of the entire balanced equation and then divide it by the number of moles of H2O formed.

The balanced equation shows that 1 mole of urea reacts to produce 1 mole of H2O. Therefore, the heat generated per mole of H2O formed is equal to the heat of combustion, which is -632.2 kJ/mol.

So, the heat generated per mole of H2O formed is -632.2 kJ/mol.

2(NH2)2CO +3O2 ==> 2CO2 + 2N2 + 4H2O dH = -632.2 kJ/mol*2 mol = 1264.4 kJ/2 mol urea or 4 mols H2O.

dH for 1 mol H2O is 1264.4/4 kJ.