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terminology - What is considered room temperature in Celsius ...
8. Considering you've read Wikipedia article on room temperature (r.t.), you probably already have an idea that there is no uniformly defined value due to the subjective matter the term is defined upon. There are numerous standards across industries defining temperature ranges, most of which lead to the value for r.t. of (20 ±5)∘C. (20 ± 5 ...
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Saturated vs unsaturated fats - Structure in relation to room ...
I'm sure most of us have heard that saturated fats are solid at room temperature, and unsaturated fats are liquid at room temperature. I'm wondering how this relates to their chemical structure -- saturated fats contain only single bonds between carbons, yet to qualify as an unsaturated fat a C=C double bond must exist.
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Room temperatures - MoneySavingExpert Forum
21C - recommended living room temperature. Less than 20C - death risk begins. 18C - recommended bedroom temperature. 16C - resistance to respiratory diseases weakened. 12C - more than two hours at this temperature raises blood pressure and increases heart attack and stroke risk. 5C - Significant risk of hypothermia.
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What is the condensation point of water? - Chemistry Stack Exchange
For temperature above 0 Kelvin and 273.15 Kelvin (0 Celsius) or below then water condensing from the atmosphere would form ice. For temperature between 0 Celsius and 100 Celsius liquid water would condense. Above 100 Celsius water wouldn't condense unless the gas phase of the system was under pressure. Share.
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How does the room gets heated by leaving a fridge open?
If the door of the refrigerator is kept open, the room in which the refrigerator is kept: gets cooled or heated depending on the initial temperature of the room. The answer mentioned is option b) gets heated It doesn't seem convincing that on opening refrigerator's door the room gets heated. Also the radiator emits out the heat in the surrounding.
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At what pressure will hydrogen start to liquefy at room temperature?
Hence, while you can't change hydrogen into a liquid at room temperature, you can change it into a (supercritical) fluid. Incidentally, there are two established storage technologies for pure hydrogen in vehicles. One involves cooling the hydrogen below its critical temperature and liquifying it.
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thermodynamics - Most endothermic room-temperature reaction - Chemistry ...
1. One endothermic low-temperature reaction that gets a lot if use, seasonally, is salting of icy or snowy surfaces. The sodium chloride combines with the ice to form a liquid solution. Sodium chloride has little heat of solution either way with liquid water, but here the solid ice has to be converted to the liquid.
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Room-conditions supercritical fluids? - Chemistry Stack Exchange
If there is a compound with critical parameters sufficiently near standard, you could touch liquid-like, not gas-like supercritical fluid. Ionic liquids have relatively low critical pressures (even only 14 bar), but too high crit. temperatures (source). On the other hand ethane's crit. temp. is below 30°C, but pressure over 48 atm.
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What does enthalpy of formation at room temperature mean?
The molar enthalpy of formation at room temperature is not dependent on the reaction effectively happening at the room temperature. It follows the general principle of state variables, being related to the Hess's law, which refers to the fundamental law of energy conservation. The principle says, that the change of enthalpy ( or any other state ...
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How does water evaporate completely when at room temperature?
36. As your small percentage of molecules with high enough kinetic energy evaporates, the remaining liquid water cools down. But in doing so, it drains heat from its surroundings and thus stays at room temperature (or close to it), so there is still some fraction of molecules that can evaporate, and they do so, and more heat is transferred from ...
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