Question Detail
Question
An automobile tire is filled to a gauge pressure of 225 kPa at 25°C. After driving, temperature rises to 48°C. What is the new gauge pressure?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Absolute P1 = 225+101=326 kPa. T1=298K, T2=321K. P2=326×(321/298)=351 kPa. Gauge = 351−101 ≈ 250 kPa → closest 243 kPa.
Hint
Use absolute pressure and Kelvin scale.