A250. ml sample of gas at 1.00 atm and 20.0°c has the temperature increased to 40.0°c and the volume increased to 500. ml. what is the new pressure?
a. 0.374 atm
b. 0.534 atm
c. 2.14 atm
d. 1.87 atm
e. 0.468 atm

Answer : The new pressure is, 0.534 atm

Solution :

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

where,

= initial pressure of gas = 1.00 atm

= final pressure of gas = ?

= initial volume of gas = 250 ml

= final volume of gas = 500 ml

= initial temperature of gas =

= final temperature of gas =

Now put all the given values in the above equation, we get the final pressure of gas.

Therefore, the new pressure is, 0.534 atm

the total distance traveled by the car is

30km + 49km = 79 km .