What happens when a thermometer is placed in hot water?
When heated, the molecules of the liquid in the thermometer move faster, causing them to get a little further apart. This results in movement up the thermometer.
Does liquid in the thermometer rise when put in hot water?
1. The liquid in the thermometer goes up when the thermometer is heated because heating makes the alcohol molecules of the liquid move faster. The extra speed of the molecules competes with their attraction for one another and causes them to move slightly further apart.
When a thermometer is placed in hot water the liquid inside the tube?
question. The hot water heats the liquid, causing it to expand and therefore liquid in the thermometer rises. A thermometer is used to determine the temperature of a person’s body. It is made out of a graded long glass tube.
What happens to the mercury when a thermometer is dipped in cold water?
Answer: When the thermometer is placed in cold water, the molecules slow down and their attractions bring them a little closer together bringing them down the tube…
When a mercury thermometer is used to measure the temperature of hot water it is observed that the mercury level first drops before beginning to rise explain?
Mercury is much heavier than water ( more than 13 times ) so it will rapidly sink to the bottom when mixed with water. How does mercury change its size based on the temperature in a thermometer? Mercury expands as it gets warmer and fills an evacuated capillary tube above the bulb, a reservoir for the mercury.
What happens when mercury is heated?
Elemental (Metallic) Mercury At room temperature, exposed elemental mercury can evaporate to become an invisible, odorless toxic vapor. If heated, it is a colorless, odorless gas.
When a mercury thermometer is warmed the mercury level momentarily goes down before it rises Why?
Step 1 When the mercury thermometer is warmed, the glass bulb which contains the mercury will get heated up first. Due to this, the molecules in the glass bulb will vibrate faster and as a result, the glass tube will expand. So, the level of the mercury will go down before it gets heated up.
What happens to mercury at boiling point?
Mercury has a melting point of -38.9oC, a boiling point of 356.7oC, and is the only metal to remain in liquid form at room temperature.
What is formed when mercury is heated above its boiling point?
Mercury does not combine with oxygen to produce mercury(II) oxide, HgO, at a useful rate until heated to the range of 300 to 350 °C (572 to 662 °F). At temperatures of about 400 °C (752 °F) and above, the reaction reverses with the compound decomposing into its elements.
When a mercury in glass thermometer is inserted into a hot liquid the mercury column first drops and then rises?
You may notice that if a mercury-in-glass thermometer is inserted into a hot liquid, the mercury column first drops, and then later starts to rise (as you expect). How do you explain this drop? The hot liquid touches the glass first, so initially the glass expands slightly.
Why does mercury first descends?
Q: Why does the column of mercury first descend and then rise when a mercury in glass thermometer is put into a flame? Sol: First the glass vessel expands by receiving heat from the flame , so the mercury level falls . Glass being a bad conductor of heat , does not transmit heat immediately to the mercury .
What happens when mercury boils?
Mercury is a fairly unreactive metal and is highly resistant to corrosion. When heated to near its boiling point (346.72 deg C/675 deg F), mercury oxidizes in air, and mercuric oxide is formed.
When a cold alcohol in glass thermometer is first placed in a hot tub of water the alcohol initially descends a bit and then rises explain?
When a cold alcohol-in-glass thermometer is first placed in a hot tub of water, the alcohol initially descends a bit then rises. Explain. The glass will first warm due to the hot water, so the glass will expand initially. As the glass initially expands, the level of alcohol will decrease.
Why the column of mercury in thermometer first descends and then rises when placed in hot water?
The column of mercury descends slightly because glass expands first before the mercury.
Why does mercury rise in thermometer?
In a mercury thermometer, the level of mercury rises when its bulb comes in contact with a hot object. What is the reason for this rise in the level of mercury? Answer: Mercury gets expanded on heating, hence its level rises in the capillary when comes in contact with a hot object.
When a mercury in glass thermometer is inserted into a hot liquid the mercury column first drops and then rises explain this behavior?
This increases the volume inside the glass, and so the mercury level drops slightly. Once the mercury heats up, it begins to expand and then the characteristic rise in the mercury column follows, indicating the increase in temperature that you expected to measure. Two drinking glasses are stuck, one inside the other.
Does mercury evaporate in hot water?
Mercury is slightly soluble in water. At room temperature the solubility is about 56μg/litre. So while the mercury would not evaporate if you added enough water, or kept replacing the water, the bead of mercury would eventually dissolve away.
What will happen if mercury is added to water?
The U.S. EPA has found mercury in water has the potential to cause kidney damage from short-term exposures at levels above the maximum contaminant level (MCL).
When a cold alcohol thermometer is placed in a hot liquid?
When a cold alcohol thermometer is placed in a hot liquid, heat is transferred from the liquid to the thermometer by thermal equilibrium. However, during this transfer, the glass of the thermometer first get in touch with the liquid and thus it receives the heat and expands.
What happens when a mercury thermometer is immersed in a hot liquid?
When a mercury thermometer is immersed in a hot liquid, the mercury level goes down at first and then goes up. Why? Physics Major? Is there Santa? When a mercury thermometer is immersed in a hot liquid, the mercury level goes down at first and then goes up.
When a mercury thermometer is placed in hot water, the bulb at first gets heat from outside and expands and hence, the column of mercury in the thermometer at first descends slightly. Later on, heat is passed to the mercury and it expands.
What are mercury thermometers used for?
Mercury thermometers are used in: power plants and piping chemical tanks and vats heating and cooling equipment breweries, canneries bakeries, candy making dairies, ships wineries and distilleries paint kettles
What happens to water temperature in a tub filled with Mercury?
U might be thinking of the heat lost by water to Mercury to attain Thermo equilibrium might lead to drop in water temperature in tub-but that doesn’t effect much as Mercury is in really small quantity so it reach to same temperature of external surrounding without any significant heat gain.