Use the reaction and bond information to answer the question.
H2 + CO2 → CH2O2
Reactant bond energies: H–H is 432 kJ/mol, C=O is 799 kJ/mol
Product bond energies: C–H is 413 kJ/mol, C=O is 745 kJ/mol, C–O is 358 kJ/mol, O–H is 467 kJ/mol
Is this system endothermic or exothermic, and why?
(1 point)
A.) It is endothermic because more energy is needed to break up the reactants versus the amount given off by the products.
B.) It is exothermic because more energy is needed to break up the reactants versus the amount given off by the products.
C.) It is exothermic because more energy is given off by the products versus the amount needed to break up the reactants.
D.) It is endothermic because more energy is given off by the products versus the amount needed to break up the reactants.
I believe i am, and for anyone wondering A was correct :)
hey are yoi doing CA?
1 Absorbed
2 O=O
3 2,030 kJ
4 Yes, it would occur without additional energy because the reaction is exothermic.
5 The reaction is endothermic, because stronger bonds are broken than formed.
Forgot to say what i think it is
I think it’s A
if someone would let me know i would really appreciate it :)
To determine if the system is endothermic or exothermic, we need to compare the amount of energy needed to break the bonds in the reactants with the amount of energy released when the new bonds are formed in the products.
First, let's calculate the energy needed to break the bonds in the reactants:
For H2, there are two H-H bonds, so the total energy needed is 2 * 432 kJ/mol = 864 kJ/mol.
For CO2, there is one C=O bond, so the total energy needed is 799 kJ/mol.
Next, let's calculate the energy released when the new bonds are formed in the products:
For CH2O2, there are four C-H bonds, one C=O bond, one C-O bond, and two O-H bonds. The total energy released is 4 * 413 kJ/mol + 745 kJ/mol + 358 kJ/mol + 2 * 467 kJ/mol = 2985 kJ/mol.
Now, by comparing the energy needed to break the bonds in the reactants (1663 kJ/mol) with the energy released when the new bonds are formed in the products (2985 kJ/mol), we can see that more energy is given off by the products than is needed to break up the reactants.
Therefore, the correct answer is:
C.) It is exothermic because more energy is given off by the products versus the amount needed to break up the reactants.