MSRX StoryQuest

Rates, Energetics & Electrochemistry

How fast, how hot, and which way the electrons went.

M041Explorer

Reaction rates

rate=Δ[P]Δtrate = \frac{\Delta[P]}{\Delta t}

a chemical hand-warmer being timed before a mountain expedition

Reaction vesselEnter mission M042Explorer

Catalyst pathways

Ea,cat=Ea−ΔEE_{a,cat} = E_a - \Delta E

an exhaust converter that stopped working in cold weather

Reaction vesselEnter mission M043Challenge

Oxidation

Ox:e− lost\mathrm{Ox}: e^- \text{ lost}

a hull inspection finding rust below the waterline

Electron transfer cellEnter mission M044Challenge

Reduction

Red:e− gained\mathrm{Red}: e^- \text{ gained}

a silver recovery cell reclaiming metal from waste solution

Electron transfer cellEnter mission M049Challenge

Heat of reaction

ΔH=qn\Delta H = \frac{q}{n}

a calorimeter checking a new hand-warmer formula

Heat bridgeEnter mission M062Explorer

Surface area and rate

r∝Ar \propto A

a limestone kiln deciding how finely to crush its feedstock

Reaction vesselEnter mission M063Challenge

Charge in electrolysis

Q=ItQ = It

an electroplating bath depositing a fixed mass of nickel

Electron transfer cellEnter mission M067Explorer

Rusting and oxygen

4Fe+3O2→2Fe2O34\text{Fe} + 3\text{O}_2 \rightarrow 2\text{Fe}_2\text{O}_3

a bridge inspector estimating iron lost to a season of rust

Electron transfer cellEnter mission M069Explorer

Exothermic reactions

ΔH<0\Delta H < 0

a self-heating ration pack being specified for a relief agency

Heat bridgeEnter mission