0
Temperature
This category is for questions about the various units and conversions of temperature, as well as the freezing point and boiling point of elements and compounds.
19,212 Questions
Is celcius a temperature scale?
Yes, Celsius is a temperature scale commonly used in many countries around the world, including in sciences, meteorology, and daily life. It is based on the freezing and boiling points of water, with 0 degrees Celsius as the freezing point and 100 degrees Celsius as the boiling point at standard atmospheric pressure.
Why was agar cooled below 50 degrees celsius?
Agar is cooled below 50 degrees Celsius to prevent it from solidifying too quickly. This allows time for the agar to be poured into Petri dishes and to evenly distribute any added nutrients or samples before it solidifies. Cooling it slowly also helps to avoid the formation of air bubbles in the agar.
Why it is impossible for anything to be colder than the lowest possible temperature?
Because - 'absolute zero' (0 Kelvin or -373 Celsius) - is the temperature at which everything freezes. Scientific testing has not found any substance or object that does not freeze below absolute zero.
Absolute temperature was introduced to resolve this problem.
If 25 Kelvin is doubled to 50 Kelvin then average kinetic energy and hotness also doubles.
Consider an example:
Suppose the temperature is 0 Celsius at midnight. At noon it will be twice as hot.
This is a paradox because mathematically it will be the same. (2x0=0)
The same is true for the question at hand.
25 degrees Celsius is the same as 298 Kelvin and 50 degree Celsius the same as 323 Kelvin.
323 is not twice of 298.
The long version:Lets start with the facts. Celsius is a scale of measuring temperature. It is a common scale that is used most all over the world, even in US, although they are more used to Fahrenheit.To say that 50 degrees Celsius is twice as hot as 25 degrees Celsius makes sense. 25x2 equals 50.
The math does not lie. Math can not lie. This is true to the scale applied.
From this I could say that the statement made in the question regarding this is incorrect, you must be wrong.
However.
If I am assuming that you are correct in your statement, then there "must" be an "error" somewhere.
We know that the Celsius scale is a relative scale but where does it begin? Where are the "end-points"?
We know that it has got negative values as well. How far down does it go?
Lets consider 1 Degree Celsius as One unit of measurement.
Celsius goes down to -273 Degrees Celsius. This makes 273 units before its relative start point of Zero. This is where we now "invert" the Celsius scale and start at the very bottom and only deal with positive numbers.
We have now "re-invented" the Absolute Scale of Kelvin. The units are the same. One Kelvin unit is equal to One Celsius Unit. It starts at the beginning instead of "way up".
We will now think about the question using this absolute Kelvin scale instead.
First we convert 25 and 50 into Kelvin (we just add 273 to both. This works because the units are the same.) This gives 298 K and 323 K.
Kelvin gives us the actual energy level (as in heat) instead of an energy level related to the melting point of ice as Celsius does. From this we can see that 323 k is not the double of 298 k and your statement in the question is correct.
I will again point out that Math does not lie.
Note.
Math can easily be "deceiving" when one need one kind of an answer and ask the question in regards to something else.
Some questions does only make sense when thinking about them "outside the box".
Scientists think "outside the box" all the time. :-)
175 degrees Fahrenheit is equivalent to 79.444 degrees Celsius
What Infrared thermometer is best used to measure the temperature?
A non-contact infrared thermometer is best used to measure temperature accurately and quickly. Look for one with a wide temperature range, adjustable emissivity settings, and high accuracy for best results. It is important to calibrate the thermometer regularly for precise measurements.
How hot is mercury degrees Celsius?
Mercury's surface temperature can vary greatly due to its lack of atmosphere, reaching up to 430 degrees Celsius on the side facing the Sun and dropping to -180 degrees Celsius during the night.
How to use a thermometer accurately when reading the temperature?
To use a thermometer accurately when reading the temperature, first ensure the thermometer is clean and calibrated. Insert the thermometer into the area being measured (e.g., under the tongue, in the ear, or in the armpit) and wait for the reading to stabilize. Be sure to follow the manufacturer's instructions for the specific type of thermometer being used.
The temperature of the water leaving the condenser would depend on the amount of heat removed from the water in the condenser. Without this information, it is not possible to accurately determine the temperature of the water leaving the condenser.
What is the temperature -273 and degC?
-273 degrees Celsius is equivalent to 0 Kelvin. This is known as absolute zero, the lowest possible temperature where all molecular motion stops.
What is normal boiling point of achool?
Alcohol is almost every substance that has OH group. [of course except acids and carbohydrates, but that's not the point].
So the boiling point will be different according to length of carbon chain.
For example methanol has a boiling point around 60 degrees Celsius.
Ethanol [alcohol which is in beer wine and all other alcohol drinks] has a boiling point somewhere around 80 degrees Celsius.
For other alcohols you should try some organic chemistry books
Why are substances with low boiling point gas?
well these substances turn into gases very easily
boiling turns liquid into gas, and with a low boiling point, this means it doesn't take much heat to make that substance a gas
(they may even be gases at room temperature)
A liquid boils when the molecules are going fast enough to create vapor pressure equal to the atmospheric pressure. The higher the temperature, the faster the molecules are moving. Temperature measures the average kinetic energy of the molecules. So when you heat water to make it boil, you are actually providing enough heat energy to be converted into kinetic energy, so the molecules are moving fast enough, to produce enough vapor pressure to push the air out of the way, so the water molecules can get out of the water and into the air. (What a run on sentence)
So when you go up on top of a mountain where the air pressure is less, so it is easier for the water molecules go fast enough to produce enough water vapor pressure to push the air molecules out of the way.
So the Boiling point for a liquid on top of a mountain is lower than for the same liquid at sea level.
I wonder if any teachers besides me tell students that the air molecules above a pan of water are colliding with the water molecules in the pan, so the water molecules can not produce ……
If the temperature changes by 100k by how much does it change in celsius?
To convert kelvin to celsius, you need to subtract 273.15 from the temperature in kelvin. Therefore, a change of 100K is equivalent to a change of 100°C in celsius.
How does the Kelvin scale link to heat?
The Kelvin scale is an absolute temperature scale where zero represents absolute zero, the theoretical absence of all heat energy. As temperature increases on the Kelvin scale, so does the average kinetic energy of particles, indicating a rise in heat energy. This means that a higher Kelvin temperature corresponds to more heat energy present in a substance.
What is the density if water is cooled fron 4 degrees celcius to 0 degrees celcius?
The density of water increases as it cools from 4 degrees Celsius to 0 degrees Celsius. At 4 degrees Celsius, the density of water is 999.972 kg/m³, and at 0 degrees Celsius the density is 999.8395 kg/m³.
How much energy is required to raise the temperature of 3 kg of iron from 20 c to 23 c?
The specific heat capacity of iron is 0.45 J/g°C. Therefore, the energy required to raise the temperature of 3 kg (3000 g) of iron by 3°C is calculated as follows: Energy = mass x specific heat capacity x temperature change. Plugging in the values, we get Energy = 3000g x 0.45 J/g°C x 3°C = 4050 Joules.
How valid is the assumption that the initial temperature of the steam is 100 degrees celsius?
The assumption that the initial temperature of steam is 100 degrees Celsius is generally valid when referring to saturated steam at atmospheric pressure. However, it's important to consider that the temperature of steam can vary depending on the pressure or if it is superheated. Additional information or measurements may be needed to confirm the exact initial temperature of the steam in a specific scenario.
What is the state of rubidium at 25 degrees celsius?
At 25 degrees Celsius, rubidium is a solid. Rubidium has a melting point of 39.3 degrees Celsius, so at 25 degrees Celsius, it would be in its solid state.
What is the analogy Cold is to freezing as lapse is to what?
The analogy would be Cold is to freezing as lapse is to mistake. Just as freezing is an extreme manifestation of cold, mistake is an extreme result of a lapse in judgment or attention.
The specific heat capacity of aluminum is 0.9 J/g°C. To calculate the energy required to raise the temperature of 0.2kg of aluminum by 3 degrees Celsius, you would use the formula: Energy = mass x specific heat capacity x temperature change. Substituting the values into the formula, Energy = 0.2kg x 0.9 J/g°C x 3°C = 0.54 Joules.
