Register to reply

1st Year chem question

by Intr3pid
Tags: chem
Share this thread:
Nov21-08, 08:17 PM
P: 39
1. The problem statement, all variables and given/known data

Which of the following solid substances can be liquefied simply by increasing the pressure suffciently?
ice (H2O)
diamond (C)
dry ice (CO2)
sulfur (S)
graphite (C)

Which of the following substances cannot be liquified at 1 atm pressure?
nitrogen (N2)
helium (He)
hydrogen (H2)
water (H2O)
carbon dioxide (CO2)

2. Relevant equations

3. The attempt at a solution
I know that some of them are solids, liquids and gases in standard state but I dont know which can be liquified etc. help?
Phys.Org News Partner Science news on
Flapping baby birds give clues to origin of flight
Prions can trigger 'stuck' wine fermentations, researchers find
Socially-assistive robots help kids with autism learn by providing personalized prompts
Nov22-08, 03:36 AM
Borek's Avatar
P: 23,577
In general, you will need phase diagrams for these. And without temperature given first question can't be answered. See water phase diagram:

Register to reply

Related Discussions
Chem question Biology, Chemistry & Other Homework 2
Chem question.. Please help.. Biology, Chemistry & Other Homework 7
Need help on a Chem Question... Biology, Chemistry & Other Homework 6
Asbestos insulation - first year chem eng problem Engineering, Comp Sci, & Technology Homework 1
Chem question Chemistry 4