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a☆Chemistry☆ > thermodynamics > Flashcards

thermodynamics Flashcards

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1
Q

Why does a smaller or more highly charged ion have a more exothermic enthalpy of hydration

A

Smaller has higher charge density

Stronger electrostatic attraction to lone pair on O in water

Stronger bonds

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2
Q

What is 🔺️H on a graph

A

Y intercept

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3
Q

What is 🔺️S on a graph

A

Gradient = - 🔺️S
x1000
To convert back
(So if slope down its a negative gradient meaning S is positive )

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4
Q

What is the equation for 🔺️S or 🔺️H

A

sum of products - sum of reactants

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5
Q

What is enthalpy change

A

Heat energy change at a constant pressure

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a☆Chemistry☆ (10 decks)

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