Question

When a dark grey solid element is heated, it changes directly into a purple gas. Which word describes this changes?

Answer 1

Explanation:

this page describes how to perform a flame test for a range ... strontium, cesium, sodium and lithium (from left to right). ... Confirm the colors with the elements on Table 1

Answer 2

Answer: Sublimation is the correct word.

When a dark grey solid element is heated, it changes directly into a purple gas because of sublimation.

What is a Sublimation?

• Without going through the liquid state, sublimation is the process by which a substance moves directly from the solid to the gas state.
• The triple point on a substance's phase diagram corresponds to the lowest pressure at which the substance can remain as a liquid, and sublimation is an endothermic process that takes place there.
• Deposition, also known as desublimation, is the opposite of sublimation, in which a substance transitions straight from the gas phase to the solid phase. A solid-to-gas transition (sublimation) followed by a gas-to-solid transition has also been referred to as sublimation (deposition).
• There is no difference between the transition from solid to gas, which always takes place as sublimation from the surface, and the transition from liquid to gas, which happens as boiling with the creation of bubbles in the inside of the liquid if it occurs at the boiling point.
• Most chemical compounds and elements have three distinct states at various temperatures when under normal pressure.
• In these situations, a liquid state is necessary to complete the transition from the solid to the gaseous state.

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