## What phase is oxygen at?

A simple substance of oxygen molecules is in the gas phase at ambient conditions and exhibits a series of phase transitions with compression to liquid and solid. At room temperature, there are 2 solid phases (beta and delta phases) stable below 9.6 GPa (1).

## What is a phase change diagram?

Phase diagram is a graphical representation of the physical states of a substance under different conditions of temperature and pressure. A typical phase diagram has pressure on the y-axis and temperature on the x-axis. As we cross the lines or curves on the phase diagram, a phase change occurs.

What is the phase of oxygen at 80 K?

at 80 k (-193 degrees C) oxygen is a liquid and nitrogen is a gas.

### What is the phase change diagram of water?

In water’s diagram, the slope of the line between the solid and liquid states is negative rather than positive. The reason is that water is an unusual substance in that its solid state is less dense than the liquid state. Ice floats in liquid water.

### What is the R of oxygen?

0.2598
Properties of Various Ideal Gases (at 300 K)

Gas Formula Gas constant
Neon Ne 0.4119
Nitrogen N2 0.2968
Octane C8H18 0.0729
Oxygen O2 0.2598

What is the importance of phase diagram?

Phase diagrams are useful because they allow us to understand in what state matter exists under certain conditions.

## What phase is CO2 at STP?

At standard temperature and pressure (STP), CO2 exists as a gas. At the tripple point (5.11 atm , -56.4 oCelsius) all phases exist in equilibrium.

## What are the phase changes?

A phase change is when matter changes to from one state (solid, liquid, gas, plasma) to another. (see figure 1). These changes occur when sufficient energy is supplied to the system (or a sufficient amount is lost), and also occur when the pressure on the system is changed.

What is the value for R?

The value of R depends on the units involved, but is usually stated with S.I. units as: R = 8.314 J/mol·K (also R = 8.314 Joules/Kelvin.) It is crucial to match your units of Pressure, Volume, number of mole, and Temperature with the units of R.

### Who named oxygen?

Antoine Lavoisier
Among them was the colorless and highly reactive gas he called “dephlogisticated air,” to which the great French chemist Antoine Lavoisier would soon give the name “oxygen.”