How would a thermometer be different if glass expands more than mercury with increase in temperature?

How would a thermometer be different if glass expands more than mercury with increase in temperature?

If glass expanded more with increasing temperature than mercury the scale of the thermometer would be upside down.

Why is the expansion of the glass of the thermometer ignored?

The pressure of a constant volume of gas increases with temperature. 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.

Which has the larger coefficient of linear expansion glass or mercury?

Based on the operation of these common thermometers, which has the larger coefficient of linear expansion, glass or mercury? Mercury. If the glass expanded more than the mercury, the reading would go down as the temperature went up!

Does mercury have a high coefficient of expansion?

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.

What will happen if the glass of thermometer and the mercury it contains have the same rates of expansion for changes in temperature?

The glass expansion is often so small as to be considered negligible (though it does change volume with change in temperature, as well). So, as long as the mercury and the glass experience the same ΔT, they will expand together.

When using a mercury in glass thermometer What is the effect of the expansion of the glass?

Mercury-in-glass thermometers consist of a sealed glass tube calibrated in degrees Centigrade and/or degrees Fahrenheit, with a mercury-filled reservoir at one end. The mercury in the reservoir expands with increased temperature, climbing higher up the thermometer, and it contracts and recedes as the temperature falls.

What causes the mercury of a thermometer to expand and contract?

Thermal Expansion and Contraction The expansion occurs because the atoms in a material vibrate more strongly as you add heat energy to them; as the vibrations increase, the average distance between atoms also increases. For the same reason, materials contract as temperatures decrease.

What would happen if the glass of a thermometer expand more on warming?

In conclusion, if the glass part of a thermometer expanded more on the warming than the liquid did in the tube, the scale present on the thermometer would be reversed in such a way that the higher values of temperature will be found closer to the surface.

How does coefficient of volume expansion of mercury and glass compare about the same glass is larger mercury is larger?

Normally, mercury-in-glass thermometers work because the mercury changes volume much more than the glass does, primarily because it has a larger coefficient of volume expansion. The glass expansion is often so small as to be considered negligible (though it does change volume with change in temperature, as well).

When using a mercury-in-glass thermometer What is the effect of the expansion of the glass?

How does mercury expand in a thermometer?

The mercury pools in the bulb, but when it heats up, it expands. Because it can’t expand through the bottom of the bulb, it is forced up the tube. That expansion, caused by the atoms flying around faster and taking up more space, is what makes the thermometer work.

Why does a mercury expand?

The expansion occurs because the atoms in a material vibrate more strongly as you add heat energy to them; as the vibrations increase, the average distance between atoms also increases.