Open Question
Based on the phase diagram of CO2 shown in Figure 11.39(b), describe the state changes that occur when the temperature of CO2 is increased from 190 K to 350 K at a constant pressure of (b) 5.1 atm, (c) 10 atm, and (d) 100 atm.
13. Liquids, Solids & Intermolecular Forces
Phase Diagrams
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What happens to the arrangement of water molecules as water melts and freezes?
A
As water melts, molecules form a crystalline structure; as it freezes, they become disordered.
B
As water melts, molecules remain in a fixed position; as it freezes, they start moving freely.
C
As water melts, molecules become more ordered; as it freezes, they become less ordered.
D
As water melts, molecules become less ordered; as it freezes, they become more ordered.
Verified step by step guidance1
Understand the structure of water molecules in different states: In the solid state (ice), water molecules are arranged in a highly ordered crystalline structure due to hydrogen bonding.
Consider the melting process: As ice melts, the energy input breaks some of the hydrogen bonds, causing the molecules to move more freely and become less ordered, transitioning to a liquid state.
Analyze the freezing process: When water freezes, the temperature decreases, and the kinetic energy of the molecules reduces, allowing hydrogen bonds to reform and the molecules to arrange themselves into a more ordered crystalline structure.
Compare the order of molecules: In the liquid state, water molecules are less ordered compared to the solid state, where they are in a fixed, orderly pattern.
Conclude the changes in molecular arrangement: As water melts, the molecular arrangement becomes less ordered due to increased movement. Conversely, as water freezes, the arrangement becomes more ordered as the molecules settle into a crystalline structure.
3:13mWatch next
Master States of Matter of Phase Diagrams with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
