- Study guides, Class notes & Summaries

What is EFFUSION - ANSWER- the escape of gas molecules from high pressure region to low pressure region GRAHAM'S LAW states that the rates of both EFFUSION and DIFFUSION are _____ proportional to the molecule's molar mass - ANSWER- INVERSELY PROPORTIONAL to MOLAR MASS rate(2)/rate(1) = sq root (M1/M2) EFFUSION TIMES - ANSWER- time(1)/time(2) = rate(2)/rate(1) = sq root (M1/M2) FOR EQUAL NUMBERS OF MOLES! The PERFECT GAS LAW assumes that there are no _____ or _____ forces between mo...

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5 pages

Written in 2024/2025

Grade A+

LECTpharis

PHYSICAL CHEMISTRY EXAM BUNDLE (COMPLETE PACKAGE)PHYSICAL CHEMISTRY EXAM BUNDLE (COMPLETE PACKAGE)PHYSICAL CHEMISTRY EXAM BUNDLE (COMPLETE PACKAGE)PHYSICAL CHEMISTRY EXAM BUNDLE (COMPLETE PACKAGE)PHYSICAL CHEMISTRY EXAM BUNDLE (COMPLETE PACKAGE)PHYSICAL CHEMISTRY EXAM BUNDLE (COMPLETE PACKAGE)PHYSICAL CHEMISTRY EXAM BUNDLE (COMPLETE PACKAGE)PHYSICA

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9 items

papersmaster01

pV=nRT - ANSWER p= pressure (kpa) V= volume (L) n= number of moles (mol) R= gas constant (8.314 kpa-L/mol-K) T= temperature (K) w= -nRT ln (Vf/Vi) - ANSWER w= work (J) n= number of moles (mol) R= gas constant (8.314 kpa-L/mol-K) T= temperature (K) Vf/Vi= final volume/initial volume (L) w= -Pex(delta V) - ANSWER w= work (J) Pex= external pressure delta V= change in volume (L) delta H= nCpm(delta T) - ANSWER delta H= change in enthalpy (J/kg) n= number of moles (mol) Cpm= ...

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4 pages

Written in 2024/2025

Grade A

papersmaster01

system - ANSWER part of the universe in which we are interested open system - ANSWER can exchange energy and matter across its boundaries closed system - ANSWER can exchange energy, not matter across its boundaries isolated system - ANSWER can exchange neither energy nor matter across its boundaries properties - ANSWER any measurable quantities characterizing a system extensive properties - ANSWER proportional to mass of system intensive properties - ANSWER independent o...

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5 pages

Written in 2024/2025

Grade A+

papersmaster01

Where is surface chemistry used? - ANSWER Surface chemistry is used in industry, wastewater treatment, as well as in research for the respiratory field of medicine in premature babies. What is an interface? - ANSWER Interface is a surface that forms a common boundary between two bulk phases. What can be the possible bulk phases? - ANSWER Solid - gas, solid - liquid, liquid - liquid, liquid - gas. Why does solid - solid phase not meet the requirement? - ANSWER Due to atomic/molecular...

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3 pages

Written in 2024/2025

Grade A+

papersmaster01

Why might the emf of a cell be less than the standard electrode potential? - ANSWER Because concentration of Cu2+ is less than 1 mol dm-3 / less than standard equilibrium moves to left What is ammonia oxidised to? - ANSWER nitrogen Predict what you would see when aqueous sodium ferrate(VI) is added to aqueous potassium iodide - ANSWER iodine so a brown (solution) formed Fe3+ formed which is yellow or orange Fe2+ formed which is green Describe a test to show the presence of iron(I...

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3 pages

Written in 2024/2025

Grade A+

papersmaster01

In the compound [ICl2]+ [SbCl6]-, the oxidation number of chlorine is -1. What are the oxidation numbers of I and Sb in the compound? I Sb A +1 +5 B +1 +7 C +3 +5 D +3 +7 - ANSWER C Which statement best explains why nitrogen has a larger first ionisation energy than oxygen? A N atoms have less repulsion between p-orbital electrons than O atoms. B N atoms have a smaller nuclear charge than O atoms. C N atoms lose an electron from the 2s subshell, while O atoms lose an electron from th...

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4 pages

Written in 2024/2025

Grade A+

papersmaster01

State, in terms of electrons, the meaning of the term oxidising agent. [1] - ANSWER 1. Electron acceptor State two features of the current atomic model that are not shown in the Rutherford model. [2] - ANSWER 1. Nucleus containing protons and neutrons 2. Electrons in energy levels/orbitals The sample of chronium is analysed in a TOF mass spectrometer. Give two reasons why it is necessary to ionise the isotopes of chronium before they can be analysed in a TOF mass spectrometer. [2] - ANS...

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7 pages

Written in 2024/2025

Grade A

papersmaster01

Physical Chemistry Bundled Questions and Answers Latest Update (2024/2025)

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2 items

TutorJosh

decreasing the pressure colligative properties depend on... - Answers the number of particles dissolved delta S univ < 0 at 25*C... is it spontaneous or nonspontaneous - Answers it is nonspontaneous at room temp. stronger intermolecular forces effect boiling point by... - Answers increasing the boiling point hydrogen bonding - Answers gives rise to hydration shells in an aqueous solution of hydrofluoric acid entropy - Answers measures the amount of disorder enthalpy - Answers measures t...

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2 pages

Written in 2024/2025

Grade A+

TutorJosh

Markov chain - Answers A sequence of random variables with the Markov property. Transition probabilities - Answers The probabilities of moving from one state to another in a Markov chain. Markov property - Answers The future state is only determined by the present state in a Markov chain. Discrete Time Markov Chain - Answers A sequence of random variables that follows the Markov property in discrete time. Initial distribution - Answers A positive vector whose components sum to one in a Marko...

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1 pages

Written in 2024/2025

Grade A+

TutorJosh

Q1.Which one of the following is the electronic configuration of the strongest reducing agent? A 1s2 2s2 2p5 B 1s2 2s2 2p6 3s2 C 1s2 2s2 2p6 3s2 3p5 D 1s2 2s2 2p6 3s2 3p6 4s2 D Which one of the following ionisations requires less energy than the first ionisation energy of oxygen? A S(g) → S+(g) + e− B O+(g) → O2+(g) + e− C N(g) → N+(g) + e− D F(g) → F+(g) + e− A Which one of the following is the electronic configuration of an element with a maximum oxidation s...

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34 pages

Written in 2023/2024

Grade A+

Greaterheights

PHYSIC CHEM Exam 2 Questions WITH 100% CORRECT ANSWERS 2024

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56 pages

Written in 2023/2024

Grade A+

CUTENURSE1

GCSE AQA chemistry Unit 1- atomic structure and the periodic table

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5 pages

Written in 2023/2024

Grade A+

johngatheca

Atkins' PHYSICAL CHEMISTRY

3.0

(1)

2893 pages

Written in 2023/2024

Grade A+

BrainBurstTESTBANKS

Which of these is used to purify water? • calcium carbonate • reverse osmosis • DCS • colligative properties CONCEPT Applications of Solutions Report an issue with this question 2 At what temperature does water transition from being a solid to a liquid? • 212 ⁰C • 32 ⁰C • 100 ⁰C • 0 ⁰C CONCEPT Water Report an issue with this question 3 Touching the edge of a paper towel to a spilled drink results in the drink "climbing" or "wicking" up the paper tow...

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9 pages

Written in 2022/2023

Grade A+

BestKey

Isolated system system cannot exchange mater nor energy with the rest of the universe Closed system system can exchange energy but not matter with the rest of the universe Open system System can exchange energy and matter with the rest of the universe First law of thermodynamics energy in the initial state contained in the system and the rest of the universe is equal to the energy in the final state of the system and the rest of the universe Work force x displace...

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5 pages

Written in 2022/2023

Grade A+

EXAMSTUDYPLUG

Volume and pressure are considered what type of property? Correct Answer state property (how change is made doesn't matter) Isobaric Isothermal Isometric Adiabatic Correct Answer constant pressure constant temperature constant volume No heat flow A state property, or function, is considered to be what type of differential? Correct Answer Exact Differential Using the calculus rule, how could the following derivative be rewritten as 2 partial derivatives? (dx/dz) at constant y C...

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2 pages

Written in 2022/2023

Grade A+

cracker