How does an increase in the total energy of the particles in a substance affect the thermal energy of the substance?
An increase in the total energy of the particles in a substance results in an increase in the thermal energy of the substance. A change in the thermal energy of an object is related to the object’s specific heat, temperature change, and mass.
Which is a larger change in temperature a change of 1 Celsius degree or 1 Fahrenheit degree explain?
Note that the difference in degrees between the freezing and boiling points is greater for the Fahrenheit scale than for the Celsius scale. Therefore, a temperature difference of one degree Celsius is greater than a temperature difference of one degree Fahrenheit.
How does a thermometer work physics?
A thermometer has a glass tube sealed at both ends and is partly filled with a liquid like mercury or alcohol. As the temperature around the thermometer’s bulb heats up, the liquid rises in the glass tube. When it is hot, the liquid inside the thermometer will expand and rise in the tube.
Why the expansion of the glass of the thermometer is ignored?
The change in the length of the glass tube with variation in temperature is so small that we can ignore that and concentrate on the expansion of the volume of liquid in the bulb. As this volume expands it forces the liquid up into the glass tube.
Why can’t you take your own temperature with your hand?
When you’re feverish, your whole body is with a higher temperature than normal. The reason you can’t take your own temperature with your hand is because the hand is the same temperature as your head/face. You won’t be able to detect a difference in temperature between them./span>
What causes the liquid in a thermometer to drop?
When heated, the molecules of the liquid in the thermometer move faster, causing them to get a little further apart. When cooled, the molecules of the liquid in the thermometer move slower, causing them to get a little closer together. This results in movement down the thermometer.
Which would feel warmer to the touch?
Answer Expert Verified A bucket of water at 50 degree of bathtub will feel warmer to the touch than a bathtub filled with water at 25. The water at 50 degree has higher temperature because its molecules possess more kinetic energy and are moving at faster rate./span>
Why does the alcohol level in a thermometer change at different temperatures?
Why does the alcohol level in a thermometer rise when it is placed in warmer fluid? When you place a thermometer in hot water the molecules expand making more volume. The more temperature there is the more energy is given to the particles causing them to spread out, so the thermometer rises.
What liquid do they put in thermometers?
Do thermometers work upside down?
Unlike most conventional mercury thermometers, a reversing thermometer is able to record a given temperature to be viewed at a later time. If the thermometer is flipped upside down, the current temperature will be shown until it is turned upright again.
Why alcohol thermometer is used in cold countries?
Alcohol thermometers are used rather than mercury thermometers in very cold regions because alcohol has a lower freezing point than mercury. If it freezes it won’t move in the tube, so a liquid must be used that has a freezing point that’s lower than the temperature it’s measuring./span>
Which thermometer is used in cold countries?
Which kind of thermometer is the most accurate?
Rectal thermometers, which go into your rear end, are the most accurate, but they can be uncomfortable. Armpit, ear, and forehead thermometers aren’t as accurate. Most doctors think an oral thermometer, which you hold under your tongue, is best. Don’t use an old glass thermometer./span>
How accurate are alcohol thermometers?
Alcohol thermometers are also inexpensive and durable. They are typically not as accurate as mercury thermometers because of the alcohol’s susceptibility to evaporation, polymerization potential and capillary separation. Their primary advantage is safety to humans and the environment.
What are the disadvantages of alcohol thermometer?
A thermometer comparison
|Alcohol thermometer (compared to a mercury thermometer)|
|lower freezing point (-114 C)||less durable (alcohol evaporates)|
|larger coefficient of expansion||alcohol can polymerise|
|less hazardous||fluid loss by evaporation hard to avoid|
What is the main disadvantage of an alcohol thermometer?
Disadvantages. It is less durable because alcohol evaporates faster than mercury. It cannot measure high temperature because of a low boiling point. It wets the walls of the thermometer, which can adversely impact the accuracy of readings..
Which thermometer is better mercury or alcohol?
Mercury has a greater coefficient of thermal expansion than alcohol. This means a column of mercury will expand and rise more than a column of alcohol for the same temperature change. As a result, you can get finer readings with mercury. However, clinical mercury thermometers are on the decline./span>
Why is the mercury in a thermometer stored in a narrow tube?
The tube in the thermometer that contains the red liquid is very thin so that it is easier to see the liquid move up and down. The alcohol and the mercury thermometers go up by different amounts because the molecules that make up alcohol and the atoms that make up mercury are different.
What are the disadvantages of mercury?
The Weaknesses or the disadvantages of Mercury:
- It cannot measure very low temperature, because its freezing point is high (-40ºC)
- Mercury is poisonous, so it harmful if its tube is broken.
- Its price is very high.
- display is harder to read.
- cannot be used for thermograph.
- slow response.
Why do thermometers use alcohol instead of water?
Mercury is used in clinical thermometers for two reasons. For a thermometer that means it rises in the tube it’s enclosed in. Alcohol is used instead of water because it has a very low freezing point which makes it suitable for use in very cold places.
Why is alcohol preferred over mercury in thermometers?
Unlike the mercury-in-glass thermometer, the contents of an alcohol thermometer are less toxic and will evaporate quickly. The ethanol version is the most widely used due to the low cost and relatively low hazard posed by the liquid in case of breakage.
Why alcohol is used in laboratory thermometer?
Answer : Alcohol is used in a laboratory thermometer instead of a clinical thermometer because alcohol has a very low freezing point as comparison to the Mercury. It is used in the cool place or region. Freezing point is the temperature at which a liquid starts changing into solid state..
Why mercury is used in thermometer?
Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it’s used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures./span>
What happens if you break a mercury thermometer?
A broken mercury-containing thermometer can be toxic if the vapors are inhaled. The risk of poisoning from touching or swallowing mercury from a broken thermometer is low if appropriate clean-up measures are taken.
Can you still buy a mercury thermometer?
While mercury thermometers can measure temperature within one degree Celsius, digital thermometers can be as accurate as 0.001 degrees C a difference of four orders of magnitude in accuracy. This changeover won’t be a big deal for the average person “In fact, you can’t buy [mercury thermometers] anymore,” Strouse said./span>
Is it safe to use a mercury thermometer?
The small silvery ball in a mercury thermometer can be dangerous if the glass breaks and the mercury is not cleaned up properly. The mercury will evaporate and can contaminate the surrounding air and become toxic to humans and wildlife. Each thermometer contains about .
Which is better mercury thermometer or digital?
Digital thermometers provide fast results as opposed to mercury thermometers whose readings are slower to realize because you have to wait for the mercury to heat and then slowly rise to display the temperature. Mercury thermometers are designed utilizing the idea that mercury expands with heat./span>
Can I die after eating mercury from thermometer?
Mercury poisoning refers to a toxicity from mercury consumption. Mercury is a type of toxic metal that comes in different forms within the environment. The most common cause of mercury poisoning is from consuming too much methylmercury or organic mercury, which is linked to eating seafood.
Do mercury thermometers ever go bad?
The simple clinical thermometer is essentially just a capillary tube with mercury inside it. Mercury will never lose its property of expansion with heat. Your thermometer is thus forever.