Question

if the pressure of a gas is 2.42 atm, what is its pressure in kpa?

0.00318 kpa
0.0239 kpa
245 kpa
1,840 kpa

Explanation:

Identify the conversion factor between atm and kPa

$$ 1\text{ atm} = 101.325\text{ kPa} $$

Convert the given pressure to kPa

$$ P = 2.42\text{ atm} \times 101.325\text{ kPa/atm} = 245.2065\text{ kPa} $$

Round to three significant figures

$$ P \approx 245\text{ kPa} $$

Answer:

• (A) 0.00318 kPa
• (B) 0.0239 kPa
• (C) 245 kPa (Correct answer)
• (D) 1,840 kPa