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energy

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4. For each of the following situations, you are asked which of two objects or substances has the higher energy. Explain your answer with reference to the capacity of each to do work and say whether the energy that distinguishes them is kinetic energy or potential energy.

a. (1) A methane molecule, CH4, in the stratosphere or (2) a CH3 molecule and a hydrogen atom formed from breaking one of the carbon-hydrogen bonds in a CH4 molecule. b. (1) A water molecule moving at 1.63 × 103 mi/h or (2) the same water molecule moving at 1.81 × 103 mi/h. (These are the average velocities of water molecules at 110 °C and 200 °C.)

c. (1) Iodine solid or (2) iodine gas. (Assume that the two systems are at the same temperature.)

d. (1) A nitrogen monoxide, NO, molecule and an oxygen atom in the stratosphere or (2) the NO2 molecule that can form when they collide.

e. (1) Two bar magnets pushed together with the north pole of one magnet almost touching the south pole of the other magnet or (2) the same magnets farther apart.

f. (1) A water molecule moving at 1.63 × 103 mi/h or (2) a uranium hexafluoride, UF6, molecule moving at the same velocity. 

 
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energy

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40. If both systems described by the energy diagrams in the previous problem are at the same temperature, if the concentrations of initial reactants are equivalent for each reaction, and if the orientation requirements for each reaction are about the same, which of these reactions would you expect to have the greatest forward reaction rate? Why?

 
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equilibrium

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55. Predict whether each of the following reactions favor reactants, products, or neither at the temperature for which the equilibrium constant is given.

number 55.PNG
 
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relationship between the properties, describe a simple system

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I need help with this chemistry question bellow.

For each of the following pairs of gas properties, describe the relationship between the properties, describe a simple system that could be used to demonstrate the relationship, and explain the reason for the relationship:

(a)   volume and pressure when number of gas particles and temperature are constant

Relationship between the properties:

Simple system used to demonstrate:

(b)  pressure and temperature when volume and the number of gas particles are constant

Relationship between the properties:

Simple system used to demonstrate:

(c)   volume and temperature when pressure and the number of gas particles are constant

Relationship between the properties:

Simple system used to demonstrate:

(d)  the number of gas particles and pressure when volume and temperature are constant

Relationship between the properties:

Simple system used to demonstrate:

(e)  the number of gas particles and volume when pressure and temperature are constant.

Relationship between the properties:

Simple system used to demonstrate: 

 
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