Question

A gas occupies the volume of 215ml at 15C and 86.4kPa?

What is the volume of the gas in STP?
Steps?

Answer 1

About 0.1738 liters

Step-by-step explanation:

Using the formula PV=nRT, where p represents pressure in atmospheres, v represents volume in liters, n represents the number of moles of ideal gas, R represents the ideal gas constant, and T represents the temperature in kelvin, you can solve this problem. But first, you need to convert to the proper units. 215ml=0.215L, 86.4kPa is about 0.8527 atmospheres, and 15C is 288K. Plugging this into the equation, you get:

`0.8527\cdot 0.215=n \cdot 0.0821 \cdot 288\\n\approx 7.754 \cdot 10^(-3)`

Now that you know the number of moles of gas, you can plug back into the equation with STP conditions:

`1V=7.754 \cdot 10^(-3) \cdot 0.0821 \cdot 273\\V\approx 0.1738L`

Hope this helps!