Chemistry, 25.08.2019 17:20 novesparks

1. when the kelvin temperature of an enclosed gas doubles, the particles of the gas (1 point)
move faster
strike the walls of the container with less force
decrease in average kinetic energy
decrease in volume
2. the volume of a gas is reduced from 4 l to 0.5 l while the temperature is held constant. how (1 point)
2. the volume of a gas is reduced from 4 l to 0.5 l while the temperature is held constant. how
does the gas pressure change?
(1 point)
it increases by a factor of four.
it decreases by a factor of eight.
it increases by a factor of eight.
it increases by a factor of two.
3. charles's law states that (1 point)
the pressure of a gas is inversely proportional to its temperature in kelvins
the volume of a gas is directly proportional to its temperature in kelvins
the pressure of a gas is directly proportional to its temperature in kelvins
the volume of a gas is inversely proportional to its temperature in kelvins
4. a sample of gas occupies 17 ml at –112°c. what volume does the sample occupy at 70°c? (1 point)
10.6 ml
27 ml
36 ml
8.0 ml
5. the combined gas law relates which of the following? (1 point)
pressure and volume only
temperature and pressure only
volume and temperature only
temperature, pressure, and volume

Answers: 2

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Answers

Answer from: billy1123

Answer 1 : The correct option is, move faster

Explanation :

As we know that the kinetic energy of the particle of the gas is directly proportional to the temperature of the gas. That means higher the temperature higher will be the kinetic energy.

When the Kelvin temperature of an enclosed gas doubles, the kinetic energy will be double and then the particles of the gas move faster.

Answer 2 : The correct option is, It increases by a factor of eight.

Explanation :

According to the Boyle's law, the volume of the gas is inversely proportional to the pressure of the gas at constant temperature and the number of moles of gas.

$\frac{P_{final}}{P_{initial}}=\frac{V_{initial}}{V_{final}}$

$\frac{P_{final}}{P_{initial}}=\frac{4L}{0.5L}=8$

Hence, the gas pressure change increases by a factor of eight.

Answer 3 : The correct option is, the volume of a gas is directly proportional to its temperature in kelvins.

According to the Charles's law, the volume of the gas is directly proportional to the temperature of the gas at constant pressure and the number of moles of gas.

$V\propto T$

$\frac{V}{T}=k$

Answer 4 : The correct option is, 36 ml

Solution : Given,

initial volume = 17 ml

initial temperature = -112^oC=273+(-112)=161K

final temperature = 70^oC=273+70=343K

Formula used : $\frac{V_{final}}{V_{initial}}=\frac{T_{final}}{T_{initial}}$

$\frac{V_{final}}{17ml}=\frac{343K}{161K}$

$V_{final}=36ml$

Therefore, the volume of the sample occupy at 70^oC is, 36 ml

Answer 5 : The correct option is, temperature, pressure, and volume

Explanation :

Combined gas law is the combination of the Boyle's law, Charles's law and Gay Lussac's law at constant number of moles of gas.

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

The variable used in the combined gas law are temperature, pressure, and volume .

Answer from: Quest

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

Answer from: Quest

pv=nrt

explanation: