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A gas with a pressure of 25.0 psi and a temperature of 18°C is heated to 24°C. What is the new pressure of this gas?

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Answer:

26 psi

Step-by-step explanation:

Since the question is between pressure and temperature, you use Gay-Lussac's Law: (P1/T1)=(P2/T2) It's saying that the initial pressure divided by the initial temperature is equal to the final pressure divided by the final temperature.

1. Convert C to Kelvin by adding 273: 18+273=291 & 24+273=297

2. Input the numbers into the equation: (25 psi/291 K)=(P2/297 K)

3. Cross multiply 25 and 297: 25*297=7425.0000

4. Divide by 291: 7425/291=25.5155

5. Round to the correct number of sig figs (or however many the equation says to round to): 26 psi

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