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Chemistry > Energetics > Flashcards

Energetics Flashcards

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1
Q

Why is enthalpgy

A

Measuring change of heat at constant pressure

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2
Q

What is standard enthalpy for combustion

A

Enthalpy change when one mole of substance is Burt completely in oxygen in standard states and conditions

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3
Q

What is enthalpy of formation

A

Enthalpy change when mole of a compunction is formed from its constituent elements in standard states and conditions

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4
Q

How to decrease error in enthalpy experiment

A 
Make sure enough oxygen and not incomplete combustion
Use polystyrene cup
Use a lid
Reduce the distance
Increase mass of water
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5
Q

What is Hess law

A

The enthalpy change whatever the route to get from recactants to products in a chemical reaction

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6
Q

What is mean bond enthalpy

A

Avg enthalpy change needed to break the covalent bond across a range of divergent compunds

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Chemistry (16 decks)

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