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Chemistry

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Christop Hodkiewicz

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Cards in this guide (6)
How is Hess's law used to measure enthalpy of a desired reaction

... Intermediate equations with known enthalpies are added together.

How is the Hfusion used to calculate the energy needed to melt a mass of solid

Grams solid mol/g Hfusion

Which statement describes a reaction at 298 K if H 31 kJ mol S 0.093 kJ molK

It is not spontaneous.

How do reaction involving gases affect the entropy of a system

Reactions involving gases can negate the entropy of a system. However, certain gases can increase the rate of entropy. Thus, some gases are considered beneficial and others negative.

At which temperature would a reaction with H -92 kJmol S -0.199 kJ(molK) be spontaneous

400 K

What equation indicates an endothermic equation

An endothermic reaction occur with heat absorption.

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