Given the average bond energies listed below, estimated Delta H for the followin

Question

Given the average bond energies listed below, estimated Delta H for the following reaction: Average Bond Energies: H-H 436 kJ/mol Cl-Cl 242 kJ/mol H-Cl 431 kJ/mol 246 kJ +246 kJ +184 kJ none of these Given the three statements below, pick the best answer. For the H atom, the energy states are dependent only on n. Knowing the values of n, m specifies an orbital ' in) The highest energy electron for a K atom is located in a 4s orbital (i) and (ii) arc true, (iii) is not (ii) and (iii) arc true, (i) IN not (i) and I iii) are true, (ii) is not all three are true only (ii) is true Which of the following Orbital diagrams for the ground state electronic configuration for a, atom is correct? Arrange the following elements in order of increasing ionization energy O. Mg. He (lowest IE) O

Explanation / Answer

10.

HRxn = Hproducts - Hreactants

HRxn = = 2*H-Cl - (2*H-H + 2*Cl-Cl)

HRxn = 2*431 - (2*436 + 2*242) = -488 kJ/mol

the answer is not there, choose e

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