Among the given isotopes of oxygen, identify the most stable isotope. oxygen-14, oxygen-16, oxygen-18. Concept Introduction: The stability of isotopes is based on their half lives. Longer the time required to decompose to half of initial concentration higher the stability. However, the half lives are not given here so we have to go with the rule of stability of isotopes as. For the elements with atomic number less than 20, the isotope will be stable if. n p = 1 Where, n is number of neutrons. p is number of protons.

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MISSED THIS? Read Section 19.9 (Pages 878-881); Watch IWE 19.10 Consider the following reaction: CH3OH(g) CO(g) + 2H2(g) (Note that AG,CH3OH(g) = -162.3 kJ/mol and AG,co(g)=-137.2 kJ/mol.) Part A Calculate AG for this reaction at 25 °C under the following conditions: PCH₂OH Pco PH2 0.815 atm = 0.140 atm 0.170 atm Express your answer in kilojoules to three significant figures. Ο ΑΣΦ AG = -150 Submit Previous Answers Request Answer □? kJ × Incorrect; Try Again; 2 attempts remaining Calculate the free energy change under nonstandard conditions (AGrxn) by using the following relationship: AGrxn = AGrxn + RTInQ, AGxn+RTInQ, where AGxn is the standard free energy change, R is the ideal gas constant, T is the temperature in kelvins, a is the reaction quotient. Provide Feedback Next >

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Chapter 9, Problem 11P

Interpretation Introduction

Interpretation:

Among the given isotopes of oxygen, identify the most stable isotope.

oxygen-14, oxygen-16, oxygen-18.

Concept Introduction:

The stability of isotopes is based on their half lives. Longer the time required to decompose to half of initial concentration higher the stability.

However, the half lives are not given here so we have to go with the rule of stability of isotopes as.

For the elements with atomic number less than 20, the isotope will be stable if.

np=1

Where,

n is number of neutrons.

p is number of protons.

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MISSED THIS? Read Section 19.9 (Pages 878-881); Watch IWE 19.10 Consider the following reaction: CH3OH(g) CO(g) + 2H2(g) (Note that AG,CH3OH(g) = -162.3 kJ/mol and AG,co(g)=-137.2 kJ/mol.) Part A Calculate AG for this reaction at 25 °C under the following conditions: PCH₂OH Pco PH2 0.815 atm = 0.140 atm 0.170 atm Express your answer in kilojoules to three significant figures. Ο ΑΣΦ AG = -150 Submit Previous Answers Request Answer □? kJ × Incorrect; Try Again; 2 attempts remaining Calculate the free energy change under nonstandard conditions (AGrxn) by using the following relationship: AGrxn = AGrxn + RTInQ, AGxn+RTInQ, where AGxn is the standard free energy change, R is the ideal gas constant, T is the temperature in kelvins, a is the reaction quotient. Provide Feedback Next >

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