Final answer:
The formula gives P2 = 1 atm * (418.15 K / 273.15 K), resulting in a final pressure of approximately 1.53 atm.
Step-by-step explanation:
To determine the final pressure of neon gas in a steel bottle when the temperature is changed to 145°C, provided the initial conditions are at STP (standard temperature and pressure), we can use the combined gas law.
The combined gas law is P1V1/T1 = P2V2/T2. Assuming the volume does not change (V1 = V2), and knowing that at STP, the temperature is 0°C (273.15 K) and the pressure is 1 atm (101.325 kPa), we can isolate P2 (final pressure) in the equation: P2 = P1 * (T2/T1)
First, convert the final temperature in degrees Celsius to Kelvin by adding 273.15 to 145°C, giving us 418.15 K.
Now plug in the values:
P2 = 1 atm * (418.15 K / 273.15 K)
= 1.53 atm.
Therefore, the final pressure of the neon gas at 145°C would be approximately 1.53 atm.