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joja [24]
3 years ago
14

A valve to a new chamber in the bottle is opened, and the gas expands to 2 x 10-3 m3. (The gas does no work in this process beca

use the gas molecules don't have anything moving to push on.) After a while, the parts of the gas re-equilibrate, without exchanging heat with the outside. What is the new temperature, T? T =
Chemistry
1 answer:
Fed [463]3 years ago
8 0

Answer:

The temperature doesn't change

Explanation:

Given that:

dU=dQ - dW

Where

  • U: internal energy
  • W: work
  • Q: heat

If the gas does no work and doesn't exchange heat with the outside there insn't a variation of the internal energy.

Internal energy is realted to the energy in the molecules, they vibration and theregore the temperature.

So, if there isn't a change in the internal energy you may say that there isn't a change in the temperature.

The increase in the volume is balanced by a decrease of the pression.

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Draw the major organic product for the reaction of 1-phenylpropan-1-one with the provided phosphonium ylide.
prohojiy [21]

Answer:

2-methylene propylbenzene

Explanation:

The Wittig Reaction is a reaction that converts aldehydes and ketones into alkenes through reaction with a phosphorus ylide.

The ketone in this case is 1-phenylpropan-1-one. The provided phosphonium ylide is shown in the image attached. The reaction involves;

i) alkylation  

ii) addition

The product of the major organic product of the reaction is 2-methylene propylbenzene.

4 0
3 years ago
Suppose NiCl2 reacts with NaOH. For each molecule of NiCl2, how many molecules of NaOH are needed
Svetllana [295]

Answer:

2molecules

Explanation:

NiCl2 + 2NaOH -> 2NaCl + Ni(OH)2

the mole ratio is 1:2

5 0
2 years ago
Por qué los alimentos se dañan con mayor facilidad a temperatura ambiente que cuando están en la nevera?
ella [17]

Answer:

Esto se debe a que la heladera tiene mucha menor temperatura que la temperatura ambiente.

Esta menor temperatura ayuda a luchar contra los microorganismos que están en los alimentos (bacterias, hongos, etc) pues detiene en gran medida su repreduccion, la cual se ve maximizada en los rangos entre 5°C y 60°C, tal que la temperatura ambiente suele estar en el rango donde los microorganismos prosperan y se reproducen, es por ello que los alimentos se conservan mucho mejor en ambientes fríos (como la nevera) que en temperatura ambiente.

4 0
3 years ago
6 What is the main difference between a homogeneous mixture and a heterogeneous mixture?
tangare [24]
The best answer here is B , i.e. the components of a homogenous mixture are evenly distributed This means the constituents are mixed uniformly. In a heterogeneous mixture, the constituents are not mixed uniformly. Some good examples of a homogeneous mixture are: 1. Sugar solution 2. Soda 3. Water 5. soft drinks 6. Air 7. Vinegar 8. Brine Some examples of a heterogeneous mixture are: 1. Blood 2. Milk 3.Water and oil 4. Water and sand 5. Soil 6. Hollandaise sauce 8. smog
6 0
3 years ago
Classify the processes as endothermic or exothermic.
joja [24]

endothermic absorbs heat

exothermic gives heat

a. endothermic

b. exothermic

c. endothermic

d. exothermic

7 0
3 years ago
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