Tea and biscuits

[General Dryness]

9 hours ago, Shooter in the Motor said:

I had no idea that when water is boiled, the majority of the oxygen leaves the water. If you boil the water again, the drink from it will be very poor quality as it's mainly hydrogen being boiled.

 

I'll always add new water to the kettle before boiling it from this moment on.

Bollocks.

[Mudface]

4 minutes ago, General Dryness said:

Bollocks.

Seconded. I guess dissolved oxygen might be released along with the other gases that make up air, but that wouldn't just leave hydrogen. Thankfully....

[General Dryness]

Just now, Mudface said:

Seconded. I guess dissolved oxygen might be released along with the other gases that make up air, but that wouldn't just leave hydrogen. Thankfully....

Yes, Shooters kettle contains only liquid hydrogen because he done boiled off all the oxygen.

[Mudface]

Just now, General Dryness said:

Yes, Shooters kettle contains only liquid hydrogen because he done boiled off all the oxygen.

Fuckin' hate it when that happens. I was boiling some milk the other day and ended up with a pan of chlorine. Fair ruined my hot chocolate. 

[Bjornebye]

Shooter "Fancy a brew?"

 

"yeah go on mate 1 sugar thanks"

 

half an hour later - "any danger of that brew mate?"

 

Shooter "Coming right up"

 

 

 

[General Dryness]

Bang the heating on babe, its 33 Kelvin in here.

[General Dryness]

4 minutes ago, Bjornebye said:

Shooter "Fancy a brew?"

 

"yeah go on mate 1 sugar thanks"

 

half an hour later - "any danger of that brew mate?"

 

Shooter "Coming right up"

 

 

 

This might be your funniest post ever. Bravo sir.

[Guest]

1 hour ago, General Dryness said:

Bollocks.

Boiling water removes dissolved oxygen and other gases. The solubility of gases in liquids is decreased as temperature increases. This manifests as a problem when water is used for cooling, e.g. in a power plant. The warm water returned to the river is depleted in oxygen, which can kill off the fish and other animals (crustaceans, molluscs, etc.)

[General Dryness]

9 minutes ago, Shooter in the Motor said:

Boiling water removes dissolved oxygen and other gases. The solubility of gases in liquids is decreased as temperature increases. This manifests as a problem when water is used for cooling, e.g. in a power plant. The warm water returned to the river is depleted in oxygen, which can kill off the fish and other animals (crustaceans, molluscs, etc.)

Wheres that from? 

 

Think about it, boiling doesn't split atoms.

[General Dryness]

http://hotwatermagic.blogspot.com/2013/04/destructive-myths-dissolved-oxygen.html?m=1

[General Dryness]

"One common misconception people have is believing that bubbles are made of hydrogen and oxygen. When water boils, it changes phase, but the chemical bonds between the hydrogen and oxygen atoms don't break. The only oxygen in some bubbles comes from dissolved air. There isn't any hydrogen gas."

 

https://www.thoughtco.com/what-are-the-bubbles-in-boiling-water-4109061

[Guest]

There is so much conflict in information on this. 

 

https://en.wikipedia.org/wiki/Henry's_law

 

If I could work this out, I reckon we would know for sure...

 

Values of Henry's law constants[edit]

A large compilation of Henry's law constants has been published by Sander (2015).^[2] A few selected values are shown in the table below:

Henry's law constants (gases in water at 298.15 K)

equation:
unit:				(dimensionless)
O2	770	1.3×10−3	4.3×104	3.2×10−2
H2	1300	7.8×10−4	7.1×104	1.9×10−2
CO2	29	3.4×10−2	1.6×103	8.3×10−1
N2	1600	6.1×10−4	9.1×104	1.5×10−2
He	2700	3.7×10−4	1.5×105	9.1×10−3
Ne	2200	4.5×10−4	1.2×105	1.1×10−2
Ar	710	1.4×10−3	4.0×104	3.4×10−2
CO	1100	9.5×10−4	5.8×104	2.3×10−2

Temperature dependence[edit]

When the temperature of a system changes, the Henry constant also changes. The temperature dependence of equilibrium constants can generally be described with the van 't Hoff equation, which also applies to Henry's law constants:

where  is the enthalpy of dissolution. Note that the letter  in the symbol  refers to enthalpy and is not related to the letter  for Henry's law constants. Integrating the above equation and creating an expression based on  at the reference temperature  = 298.15 K yields:

^[8]

The van 't Hoff equation in this form is only valid for a limited temperature range in which  does not change much with temperature.

The following table lists some temperature dependencies:

Values of  (in K)

O2	H2	CO2	N2	He	Ne	Ar	CO
1700	500	2400	1300	230	490	1300	1300

Solubility of permanent gases usually decreases with increasing temperature at around room temperature. However, for aqueous solutions, the Henry's law solubility constant for many species goes through a minimum. For most permanent gases, the minimum is below 120 °C. Often, the smaller the gas molecule (and the lower the gas solubility in water), the lower the temperature of the maximum of the Henry's law constant. Thus, the maximum is at about 30 °C for helium, 92 to 93 °C for argon, nitrogen and oxygen, and 114 °C for xenon.^[9]

Effective Henry's law constants H_eff[edit]

The Henry's law constants mentioned so far do not consider any chemical equilibria in the aqueous phase. This type is called the "intrinsic" (or "physical") Henry's law constant. For example, the intrinsic Henry's law solubility constant of formaldehyde can be defined as

In aqueous solution, methanal is almost completely hydrated:

The total concentration of dissolved methanal is

Taking this equilibrium into account, an effective Henry's law constant  can be defined as

For acids and bases, the effective Henry's law constant is not a useful quantity because it depends on the pH of the solution.^[10] In order to obtain a pH-independent constant, the product of the intrinsic Henry's law constant  and the acidity constant  is often used for strong acids like hydrochloric acid (HCl):

Although  is usually also called a Henry's law constant, it is a different quantity and it has different units than .

[General Dryness]

Boiling reduces the amount of dissolved oxygen held in the water, but it doesn't split atoms i.e. to the stage where it's mainly hydrogen. So that bit is bollocks.

[cloggypop]

Not only do I use brand new water every time due to dissolved oxygen but I also use a brand new kettle. It's the only way to 100% avoid limescale build up. If you have more than one cuppa a day it's probably best bulk buying Hinari. 

[Elite]

"One common misconception about the chemical properties of bubbles is that people actually give a fuck."

 

Albert Einstein.

 

[magicrat]

Tea is nice and I prefer it to coffee . Hope this helps

[General Dryness]

15 minutes ago, Elite said:

"One common misconception about the chemical properties of bubbles is that people actually give a fuck."

 

Albert Einstein.

 

"Chat shit get banged."

 

Stig.

[Guest]

I have a new question.

 

Who the fuck is Henry?

[Elite]

[General Dryness]

13 minutes ago, Shooter in the Motor said:

I have a new question.

 

Who the fuck is Henry?

 

[General Dryness]

6 minutes ago, Elite said:

That cunt needs a fucking brick to the head.

[Elite]

Just now, General Dryness said:

That cunt needs a fucking brick to the head.

Bit harsh on Bobby Boucher, salt of the earth that lad.

[General Dryness]

11 minutes ago, Elite said:

Bit harsh on Bobby Boucher, salt of the earth that lad.

I meant Adam Sandler and well you know it, young man.

[Bjornebye]

2 hours ago, General Dryness said:

 

 

2 hours ago, General Dryness said:

That cunt needs a fucking brick to the head.

 

 

 

[Guest]

3 hours ago, Bjornebye said:

 

 

 

 

Henry and Dyson both. I wouldn't be surprised if Dyson had a smarmy face made to punch.