Textbook Question
Identify each of the following changes of state as melting, freezing, sublimation, or deposition:d. Frost (ice) forms on the walls of a freezer unit of arefrigerator.
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3. Matter and Energy
States of Matter
Multiple Choice
At STP, which element has a definite shape and a definite volume?
A
Bromine (Br)
B
Mercury (Hg)
C
Neon (Ne)
D
Iron (Fe)
Verified step by step guidance1
Understand the states of matter and their properties: solids have a definite shape and volume, liquids have a definite volume but no definite shape, and gases have neither definite shape nor volume.
Recall that STP (Standard Temperature and Pressure) refers to a temperature of 0°C (273 K) and a pressure of 1 atm, conditions under which elements can exist in different states.
Identify the physical state of each element at STP: Bromine (Br) is a liquid, Mercury (Hg) is a liquid, Neon (Ne) is a gas, and Iron (Fe) is a solid.
Since the question asks for an element with both definite shape and definite volume at STP, focus on the element that is a solid under these conditions.
Conclude that Iron (Fe), being a solid at STP, has both a definite shape and a definite volume, unlike the other elements listed.
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