Question

sample a
temperature: 105°c
sample b
temperature: 90°c
which sample has the higher gas pressure?
sample a
sample b
neither; the samples have the same gas pressure

Explanation:

Step1: Recall gas - pressure relationship

According to the ideal gas law $PV = nRT$ (assuming volume $V$, amount of gas $n$ are constant), pressure $P$ is directly proportional to temperature $T$ ($P=\frac{nR}{V}T$).

Step2: Compare temperatures

Sample A has a temperature of $T_A = 105^{\circ}C$ and sample B has a temperature of $T_B=90^{\circ}C$. Since $T_A>T_B$ and $P\propto T$ (constant $n$, $V$), sample A has higher gas pressure.

Answer:

sample A