The gas laws
2 marks · EasyA gas has a pressure of 105 kPa at 350 K. What will be its pressure at 420 K, if the volume remains constant?
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126 kPa (±2)
Also accept: 126000 Pa
Common mistakes: Not converting temperatures to kelvin; Incorrect proportion direction
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Marking points
M1 · 1 mark · Uses correct gas law: p_1/T_1 = p_2/T_2, substitutes correct values
A1 · 1 mark · Arrives at correct pressure (126 kPa or equivalent) (follow-through)
Worked solution
Given p_1 = 105 kPa, T_1 = 350 K, T_2 = 420 K, p_2 = ?