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Ainat [17]
2 years ago
6

What is the change in enthalpy when 180 g of water vapor condenses at 100°C? (AH, = 40.67 kJ/mol)

Chemistry
1 answer:
Snowcat [4.5K]2 years ago
5 0

Answer:

Q=-407kJ

Explanation:

Hello there!

In this case, considering that the heat has two forms, sensible (variable temperature) and latent (constant temperature), we can notice that phase changes account for latent heat as the temperature remains the same. In such a way, given the enthalpy of vaporization of water, 40.67 kJ/mol, the enthalpy of condensation (reverse process) is the negative value, -40.67 kJ/mol; therefore, the associated latent heat would be:

Q=180g*\frac{1mol}{18.02g} *-40.67\frac{kJ}{mol} \\\\Q=-407kJ

Best regards!

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2
Alina [70]

Answer:

N - 1s²2s²2p³

Explanation:

Nitrogen is located in the p-block of the periodic table (groups 13-18) and is on the 2nd period.

The 2nd period tells us the principal energy level (a quantum number) is n = 2. Therefore, it must have already filled up the 1s sublevel.

The groups 13-18 on period 2 tells us that the 2s sublevel is also filled.

Nitrogen is located in Group 15. That means that there are 3 electrons that have filled the 2p sublevel, out of a possible 6.

Therefore, our electron configuration is 1s²2s²2p³

2p³ (Shorthand Config)

[He] 2s²2p³ (Noble Gas Config)

7 0
3 years ago
Air can be considered a ____________ of gaseous elements and compounds.
vodomira [7]
The answer would be B - homogeneous mixture
5 0
3 years ago
Write a net ionic equation for the overall reaction that occurs when aqueous solutions of hydrosulfuric acid (H2S) and sodium hy
vovangra [49]

Answer: 2NH4Br(aq)+Pb(C2H302(aq)-------------------->

2NH4C2H3o2(aq) + PbBr2(s)

Explanation:

The net equation is :Pb2+ (aq)2Br (aq)---------------------->PbBr2(s)

the spectator ions NH4 +C2H3O2 are canceled

6 0
3 years ago
The animal kingdom is divided into two small groups name these two smaller groups and give examples of each include the characte
Elina [12.6K]

Answer:

vertebrate and invertebrates

Explanation:

All Vertebrates  have a skeletal structure with a spinal backbone and well developed internal skeleton made up of bones and cartilage while Invertebrates have no backbone.

Vertebrate include fish, amphibians, reptiles, birds and mammals. Invertebrates include worms and jellyfish, spiders and crabs.

<u>common characteristics among vertebrates and invertebrates </u>

○ multi-cellular.

○ heterotrophs (cannot make their own food) and must get their energy by consuming plants or other animals.

○ obtain food and oxygen for energy,

5 0
2 years ago
How much faster will ammonia vapor travel across a room then carbon dioxide
FromTheMoon [43]

Answer:

D) 1.61 times faster

Explanation:

vrms_{NH3} = √(3)RTM

R constant= 0.08206

T=constant, so in this problem we dont need a value for it

M=17.031 g/mol

√(3)(0.08206)(17.031)= 2.047

vrms_{CO2} = √(3)RTM

R constant= 0.08206

T=constant, so in this problem we dont need a value for it

M= 44.01 g/mol

√(3)(0.08206)(44.01)= 3.29

Since we are trying to measure how much faster NH3 will be, we have to realize that mass and speed have an inverse relationship.

So instead of doing (2.047)/(3.29) = 6.22

we have to flip the values to get (3.29)/(2.047)= 1.61

6 0
2 years ago
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