Question

question 14
one mole of argon, ar(g), is heated from 20°c to 30°c in a fixed container. which properties are changed (check all that apply)?
t
p
v
r
n

Explanation:

• Temperature (T): The problem states heating from \(20^\circ\text{C}\) to \(30^\circ\text{C}\), so \(T\) changes.
• Pressure (P): For a fixed - volume (fixed container) and fixed amount of gas (\(n = 1\) mole), using the ideal gas law \(PV=nRT\), when \(T\) increases and \(V\), \(n\), \(R\) are constant, \(P\) must increase (since \(P\propto T\) in this case).
• Volume (V): The container is fixed, so \(V\) remains constant.
• Gas Constant (R): \(R\) is a constant for ideal gases and does not change with temperature, volume, or pressure (for a given set of units).
• Moles (n): The amount of argon is 1 mole and is not changed during heating, so \(n\) is constant.

Answer:

• T (Temperature)
• P (Pressure)