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Chemistry

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Torrance Durgan

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Cards in this guide (15)
What is thermal energy

The total kinetic energy of the particles in a system

12 l of ammonia were produced by the haber process how many liters of hydrogen were used during the reaction the reaction took place at stp 0c and 1.0 ATM n2g plus 3h2g 2nh3g

18

A cat with two kittens are sleeping or A cat with two kittens is sleeping.

'with two kittens' describe the cat. So, you should write 'is sleeping'. But if you mean that all three of them are sleeping, write 'A cat and his two kittens are sleeping'.

What kind of changes contribute to spontaneity

An increase in entropy.

What best describes the enthalpy of formation of a substance

The energy needed to form the substance from its elements

What does it mean for heat to be transferred by convection

Energy is transferred through moving currents of warmer air or liquid.

What does a negative H tell about a reaction

The reaction is exothermic.

What does the entropy of a reaction describe

The amount of randomness in the system

What information does the latent heat of vaporization give

The energy needed to completely vaporize a mole of a liquid

How is stoichiometry used to calculate energy released when a mass of liquid freezes

Grams liquid × mol/g × Hfusion

What is the value for G at 300 K if H 27 kJmol and S 0.09 kJmolK

G = 0 kJ/mol

What statement describes the potential energy diagram of an exothermic reaction

The potential energy of the reactants is greater than the potential energy of the products.

What statement describes a reaction at 298 K if H 31 kJmol S 0.093 kJ(molK)

It is not spontaneous.

What statement best describes the second law of thermodynamics

How energy changes or moves

An aerospace engineer is designing a rocket to have three stages. Which is not a reasonable explanation for this decision

to simplify the design of the rocket.

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