A material that allows heat/electricity to transfer is called a conductor.
CO2 ~ 1 atom
N202 ~ 4 atom
CO ~ 2 atom
H2OS ~ 3 atom
B
Answer: Option (b) is the correct answer.
Explanation:
In a chemical reaction, the bonds between the reactant molecules tend to break leading to the formation of new bonds to produce products.
So, in order to break the bonds between the reactant molecules, energy is required to overcome the attraction between the atoms.
To form new bonds, energy gets released when two atoms come closer to each other. Hence, formation of bond releases energy.
As in the given reaction it is shown that < 0, that is, enthalpy change is negative. Hence, energy is released as it is an exothermic process.
Thus, we can conclude that the statement energy released as the bonds in the reactants is broken is greater than the energy absorbed as the bonds in the products are formed, is true about the bond energies in this reaction.
For the reaction to take place the energy of the reactants must reach to the energy level of the products:
we have 900 J in the reactants and 9000 J for the products so the reactants need 8100 J to reach to the value of energy of products (900 + 8100 = 9000)
So the correct answer is C. <span>The reaction absorbs 8100 J of energy from the surroundings as it proceeds. </span>
3Cl2(g) + 6NaOH(aq) →5NaCl(aq) + NaClO3(aq) + 3H2O(l)
CO2(g) + H2O(l) → H2CO3(aq)
2 NH4Cl(aq) + Ca(OH)2(aq) →2 NH3(aq) + 2H2O(l) + CaCl2(aq)
2HNO3(aq) + 6HI(aq) →2NO(g) +3 I2(s) + 4H2O(l)