Energy
Thermochemical Equations
Hess's Law
Enthalpy and Entropy
Rate
100

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100

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100

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100

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100

Determine the rate for the reaction AND explain what the rate means: I2 + H2 à 2HI

The concentration of I2 is 0.450 M (fourth-order), the concentration of H2 is 0.342 M (first-order), the rate constant = 0.295 / M4×sec.

What is 4.14x10-3 M2sec? 
200

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ansb

200

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200

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200

Calculate ΔG AND determine if a reaction will be spontaneous if ∆H is +257 kJ/mol and at 35°C the ∆S is

+0.975 kJ/mol·K.

What is -43.3 kJ/mol and yes, the reaction is spontaneous?

200

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nsdasd

300

Calculate the energy (in Kcal) involved when 31.7 grams of water goes from gas at 250.0 degrees C to liquid at 11.0 degrees C.

What is -22.2 Kcal?

300

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mas d

300

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300

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mnsn dmas 

300

mmasn dmas

nsb

400

as dmasn d

asn dmasnd

400

Given: C5H12(g) à 5 C(s) + 6 H2(g) + 546.5 kJ

Calculate the amount of energy involved if 519 grams of H2 produced.

What is -23400 kj/mol?

400

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msn mad

400

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ams dma s

400

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as dasb

500

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nas dma

500

asn dma

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500

Calculate ∆H for the following reaction by showing how it follows Hess’ Law with the appropriate reactions.

CCl4 (l) + 2Ca (s) à C (s) + 2CaCl2 (s)

What is -1458.8 kj/mol?

500

mas dmas

mas dma

500

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