User RobChem

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317

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Is shielding of electrons really best described as shielding or is it really Coulombic repulsion between electrons?

Mar 14 '15 at 13:40 Chinmay Chandak 504

1

2

votes

1

answer

7k

views

How to prove that entropy is a state function?

physical-chemistry thermodynamics entropy

Feb 27 '15 at 4:46 Martin - マーチン♦ 37.8k

2

votes

1

answer

72

views

What happens to energy changes in non-reversible processes?

physical-chemistry thermodynamics

Feb 11 '15 at 16:39 Community♦ 1

2

votes

2

answers

374

views

If dS ≥ dq/T for a spontaneous change is dS ≤ dq/T for a non-spontaneous change and is that even possible?

thermodynamics entropy

Jan 22 '15 at 5:20 Martin - マーチン♦ 37.8k

1

2

votes

1

answer

2k

views

Why can syn-periplanar E2 elimination happen in molecules like vinyl bromides but seemingly not in other molecules?

organic-chemistry reaction-mechanism

Jan 21 '15 at 6:48 Martin - マーチン♦ 37.8k

2

votes

1

answer

368

views

How does the chemical potential allow for open systems to be considered?

physical-chemistry thermodynamics

Jan 9 '15 at 23:34 dtmoore1971 942

2

votes

0

answers

130

views

What distinguishes a Lewis Complex from an Adduct or are they synonymous?

inorganic-chemistry acid-base

Dec 16 '14 at 17:03 RobChem 8,636

2

votes

2

answers

17k

views

How to predict the solubility of an organic compound in different kinds of solvents? [duplicate]

aqueous-solution solvents

Dec 6 '14 at 18:31 bon 13.9k

2

votes

0

answers

290

views

How to derive the energy of solvation equation?

energy solutions

Nov 29 '14 at 17:06 RobChem 8,636

2

votes

2

answers

10k

views

What is a dl pair in stereochemistry?

stereochemistry

Oct 23 '14 at 22:36 K_P 1,486

2

votes

1

answer

328

views

What is the wave function? [duplicate]

quantum-chemistry

Sep 22 '14 at 17:20 PhysicalChemist 447

1

vote

0

answers

114

views

NiO and ZnO electrical conductivity with oxygen pressure

inorganic-chemistry solid-state-chemistry conductivity semiconductors

Jul 2 '18 at 16:55 A.K. 11.2k

1

vote

1

answer

216

views

Gibbs free energy can be expressed as a function of P,T and n but are enthalpy and internal energy also (partially) functions of n?

physical-chemistry thermodynamics

Nov 13 '16 at 14:09 Community♦ 1

1

vote

2

answers

5k

views

Why is water a poor solvent for organic molecules?

organic-chemistry aqueous-solution solubility

Nov 7 '16 at 18:06 Community♦ 1

1

vote

2

answers

4k

views

Why is dG=dH-TdS?

physical-chemistry thermodynamics free-energy

Jun 19 '16 at 17:47 orthocresol♦ 49.5k

1

vote

1

answer

417

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Chemical potential and it's implications in an open system

physical-chemistry thermodynamics free-energy

Jan 11 '16 at 20:12 orthocresol♦ 49.5k

1

vote

1

answer

1k

views

Entropy of mixing

thermodynamics solutions entropy

Nov 8 '15 at 12:04 orthocresol♦ 49.5k

1

vote

1

answer

78

views

Ignoring spin, consider an electron in a hydrogen 2p orbital, what is its orbital magnetic moment?

homework quantum-chemistry

Oct 30 '15 at 17:48 Todd Minehardt 9,124

1

vote

0

answers

397

views

Enthalpy of mixing in a regular solution

thermodynamics solutions enthalpy

Oct 25 '15 at 15:42 RobChem 8,636

1

vote

0

answers

1k

views

Entropy change when liquids at two different temperatures are mixed

physical-chemistry thermodynamics entropy

Jun 8 '15 at 20:06 Loong♦ 38.6k

1

vote

1

answer

1k

views

Mechanism for the formation of butanoic acid from ethylacetoacetate

organic-chemistry reaction-mechanism

Apr 13 '15 at 19:29 Loong♦ 38.6k

1

vote

0

answers

80

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Why does the molar conductivity decrease with increasing charge density?

physical-chemistry ions solutions

Apr 1 '15 at 17:04 RobChem 8,636

1

vote

1

answer

772

views

Why do ionic solids change to a structure with a higher coordination number at high pressures?

inorganic-chemistry ionic-compounds

Mar 24 '15 at 16:38 Jon Custer 6,118

1

vote

2

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2k

views

Second order reaction half life equation?

physical-chemistry kinetics

Feb 1 '15 at 15:00 DavePhD 36.8k

1

vote

0

answers

80

views

Why are d-orbitals required/used for hypervalent molecules (where the central atom has expanded its octet) [duplicate]

inorganic-chemistry electronic-configuration orbitals periodic-table

Jan 14 '15 at 20:06 M.A.R. 9,322

1

vote

1

answer

914

views

If the standard state symbol means that the substance is pure (and at 1 bar) how is it possible to have a standard REACTION enthalpy?

physical-chemistry thermodynamics enthalpy

Jan 10 '15 at 0:22 dtmoore1971 942

1

vote

1

answer

181

views

Is this the correct equation for the mean free path?

gas-laws

Dec 30 '14 at 18:34 Jori 5,645

1

vote

1

answer

3k

views

How do derive the equation for relative velocity of gas molecules

gas-laws

Dec 24 '14 at 16:23 DavePhD 36.8k

1

vote

1

answer

104

views

Why is a reaction more favorable if one of the products is not soluble/sparingly soluble?

thermodynamics solubility

Dec 16 '14 at 20:00 DavePhD 36.8k

1

vote

1

answer

576

views

Doesn't the fact that the lone pair on the nitrogen in amides occupy a p orbital contradict Hund's rules?

electronic-configuration hybridization

Oct 19 '14 at 20:05 ron 75.6k

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157 Questions

Is shielding of electrons really best described as shielding or is it really Coulombic repulsion between electrons?

How to prove that entropy is a state function?

What happens to energy changes in non-reversible processes?

If dS ≥ dq/T for a spontaneous change is dS ≤ dq/T for a non-spontaneous change and is that even possible?

Why can syn-periplanar E2 elimination happen in molecules like vinyl bromides but seemingly not in other molecules?

How does the chemical potential allow for open systems to be considered?

What distinguishes a Lewis Complex from an Adduct or are they synonymous?

How to predict the solubility of an organic compound in different kinds of solvents? [duplicate]

How to derive the energy of solvation equation?

What is a dl pair in stereochemistry?

What is the wave function? [duplicate]

NiO and ZnO electrical conductivity with oxygen pressure

Gibbs free energy can be expressed as a function of P,T and n but are enthalpy and internal energy also (partially) functions of n?

Why is water a poor solvent for organic molecules?

Why is dG=dH-TdS?

Chemical potential and it's implications in an open system

Entropy of mixing

Ignoring spin, consider an electron in a hydrogen 2p orbital, what is its orbital magnetic moment?

Enthalpy of mixing in a regular solution

Entropy change when liquids at two different temperatures are mixed

Mechanism for the formation of butanoic acid from ethylacetoacetate

Why does the molar conductivity decrease with increasing charge density?

Why do ionic solids change to a structure with a higher coordination number at high pressures?

Second order reaction half life equation?

Why are d-orbitals required/used for hypervalent molecules (where the central atom has expanded its octet) [duplicate]

If the standard state symbol means that the substance is pure (and at 1 bar) how is it possible to have a standard REACTION enthalpy?

Is this the correct equation for the mean free path?

How do derive the equation for relative velocity of gas molecules

Why is a reaction more favorable if one of the products is not soluble/sparingly soluble?

Doesn't the fact that the lone pair on the nitrogen in amides occupy a p orbital contradict Hund's rules?