The number of Joules needed to raise the temperature of 10 grams of water from 20°C to 30°C is

How does the temperature of the air change with altitude?

TiliK225 [7]

As you increase in elevation, there is less air above you thus the pressure decreases. As the pressure decreases, air molecules spread out further (i.e. air expands) and the temperature decreases. If the humidity is at 100 percent (because it's snowing), the temperature decreases more slowly with height.

8 0

3 years ago

Three gases (8.00 g of methane, CH4, 18.0 g of ethane, C2H6, and an unknown amount of propane, C3H8) were added to the same 10.0

klemol [59]

Answer:

Partial pressure of methane: 1.18 atm

Partial pressure of ethane: 1.45 atm

Partial pressure of propane: 2.35 atm

Explanation:

Let the total moles of gases in a container be n.

Total pressure of the gases in a container =P = 5.0 atm

Temperature of the gases in a container =T = 23°C = 296.15 K

Volume of the container = V = 10.0 L

$PV=nRT$ (Ideal gas equation)

$n=\frac{PV}{RT}=\frac{5.0 atm\times 10.0 L}{0.0821 atm L/mol K\times 296.15 K}=2.0564 mol$

Moles of methane gas = $n_1=\frac{8.00 g}{16.04 g/mol}=0.4878 mol$

Moles of ethane gas = $n_2=\frac{18.00 g}{30.07 g/mol}=0.5986 mol$

Moles of propane gas = $n_3=?$

$n=n_1+n_2+n_3$

$n_3=n-n_1-n_2=2.0564 mol-0.4878 mol-0.5986 mol= 0.9700 mol$

Partial pressure of all the gases can be calculated by using Raoult's law:

$p_i=P\times \chi_i$

$p_i$ = partial pressure of 'i' component.

$\chi_1$ = mole fraction of 'i' component in mixture

P = total pressure of the mixture

Partial pressure of methane:

$p_1=P\times \chi_1=P\times \frac{n_1}{n_1+n+2+n_3}=P\times \frac{n_1}{n}$

$p_1=5.00 atm\times \frac{0.4878 mol}{2.0564 mol}=1.18 atm$

Partial pressure of ethane:

$p_2=P\times \chi_2=P\times \frac{n_2}{n_1+n+2+n_3}=P\times \frac{n_2}{n}$

$p_2=5.00 atm\times \frac{0.5986 mol}{2.0564 mol}=1.45 atm$

Partial pressure of propane:

$p_3=P\times \chi_3=P\times \frac{n_3}{n_1+n+2+n_3}=P\times \frac{n_3}{n}$

$p_3=5.00 atm\times \frac{0.9700 mol}{2.0564 mol}=2.35 atm$

5 0

4 years ago

Glaciers also _____ materials in new places when they melt.

natali 33 [55]

Deposits

Explanation:

Glaciers also deposits materials in new places when they melt.

Glaciers are made up of snow flakes that has compressed through time.
In temperate and polar regions where they are prevalent, they are powerful agents of denudation.
They can erode, transport and deposit earth materials in places.
When a glacier retreats by melting, it deposit some of its materials in new places.
Most of this sediment are called tillites.
They are made up of unsorted materials of different size grains.

learn more:

Metamorphic rock brainly.com/question/869769

#learnwithBrainly

8 0

4 years ago

Which of the following properties of water is due primarily to the uneven distribution of charge between the hydrogen and oxygen

kotegsom [21]

The uneven distribution of charge between the hydrogen and oxygen atoms primarily leads to its <span>ability to dissolve ionic substances. This is because the unequal sharing leads to the polarity of water. Its polarity makes it dissolve to ionic substances.</span>

8 0

3 years ago

Read 2 more answers

1.the p orbital is subdivided into___,____and______

PIT_PIT [208]

Answer:

See explanation

Explanation:

The p orbital actually consists of a set of degenerate orbitals. Degenerate orbitals are orbitals having exactly the same amount of energy.

So we have the px, py and pz orbitals all having exactly the same energy but have different orientations in space. These are the degenerate orbitals in the p- sublevel.

5 0

3 years ago