High School

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If a gas has a gauge pressure of 156 kPa, its absolute pressure is approximately:

A. 100 kPa
B. 300 kPa
C. 56 kPa
D. 256 kPa

Answer :

Final answer:

To find the absolute pressure of a gas with a gauge pressure of 156 kPa, add it to the atmospheric pressure of 101 kPa, yielding 257 kPa, which rounds to the given option d) 256 kPa.

Explanation:

The question is asking to calculate the absolute pressure of a gas when the given gauge pressure is 156 kPa. To find the absolute pressure, we need to add the gauge pressure to the atmospheric pressure.

At sea level, atmospheric pressure is approximately 101 kPa. Therefore, the absolute pressure is:

156 kPa (gauge pressure) + 101 kPa (atmospheric pressure) = 257 kPa.

However, since the options provided are in increments of 100, the closest approximate answer to 257 kPa is 256 kPa (option d), acknowledging a slight rounding to fit the given answers. Therefore, the correct answer is option d) 256 kPa.

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