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10 Cards in this Set
- Front
- Back
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Define a molecular formula.
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A molecular fromula is a formula taht gives actual numbers of atoms in a molecule.
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Define an imperical formula
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A formula that gives the smallest whole number ratio of atoms in a compound.
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Which group (1 or 2) is more thermally stable?
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Group 1 because the metal iron has one positive charge rather than a double charge.
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What is the test of test 4 : S2?
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It is a colourless acidic gas that turns damp universal indicator paper red.
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What are the steps of mass spectroscopy?
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(1) vapouraization
(2) Ironisation (3) acceleration (4) deflection (5) detection. |
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An imperical formula is one that gives the smallest whole number ration of ... in a ...
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atoms
compound |
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What is the method of measuring temperature change to find the enthalpy of a reaction?
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Using a bomb calorimeter.
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Define the standard enthalpy change of formation?
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The enthalpy change that takes place when one mole of compound is formed from its elements under standard conditions.
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What are the standrd conditions of an accurate reaction connected with an enthalpy chane?
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298 calvin and 1 atmosphere.
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What is Hess's Law?
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Hess's Law states : 'The Enthalpy change of a reaction is independent of the route it takes.
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