Do pipettes blow up like balloons when they are heated. Why or why not?

Pipettes are slender, tube-like tools commonly used in laboratories for precisely measuring and transferring small volumes of liquid. They are typically made from glass or plastic, both of which have different properties when exposed to heat.

When it comes to heating pipettes, whether they would blow up like balloons or not depends on a few factors.

1. Material: Glass pipettes, especially those made from borosilicate glass, are designed to withstand high temperatures and thermal shock. This type of glass has low coefficients of thermal expansion, which means it can resist sudden temperature changes without breaking. On the other hand, plastic pipettes may be prone to melting or deforming when exposed to high heat.

2. Heat source and intensity: Pipettes should never be subjected to direct flame as it can cause thermal stress and potentially lead to breakage. If glass pipettes are exposed to intense heat, like that from a Bunsen burner flame, they may crack or shatter. Plastic pipettes can melt under high temperatures, leading to deformation.

3. Design and integrity: The structural integrity of a pipette also plays a crucial role in determining whether it can withstand heating. If a pipette has any defects, like invisible cracks or weak spots, heat can exacerbate these flaws and potentially cause them to fail.

In summary, glass pipettes are more heat-resistant than plastic ones, but both have limits. It is crucial to handle pipettes with care and avoid exposing them to extreme heat sources or temperature fluctuations. If heated properly and within their limitations, pipettes should not blow up like balloons.