Chemistry Answers

Solve: What will be the final volume of a 5.00 L He gas which contains 0.965 mole at 30°C and 1.00 atmosphere, if the amount of this gas is increased to 1.80 moles provided that the temperature and pressure remains unchanged?

Given: V₁ = 5.00L                                                       V₂ = ?

_T𝟏 = 0.965 mole                                            T_𝟐 = 1.80 moles

Solve: A certain light bulb containing argon has a pressure of 1.20 atm at 18°C. If it

will be heated to 85°C at constant volume, what will be the resulting pressure? Given: P₁ = 1.20 atm.                                                                             P₂ = ?

T₁ = 180C + 273.15= 291.15 K                            T₂ = 850C + 273.15=358.15 K

Solve: Helium gas has a volume of 250 mL at 0°C at 1.0 atm. What will be the final

pressure if the volume is reduced to 100 mL at 45°C?

Given: V1 = 250mL                                                       V2 = 100 mL

T₁ = 00C + 273.15= 273.15 K                     T₂ = 450C + 273.15=318.15 K P₁ = 1 atm                                                                    P₂ = ?

Solve: A certain light bulb containing argon has a pressure of 1.20 atm at 18°C. If it

will be heated to 85°C at constant volume, what will be the resulting pressure? 

2.   A tank ( not rigid) contains 2.5 litres of helium gas at 28⁰C . At constant pressure, what will be the volume of the tank after heating it and its content to 43⁰C temperature?

1, A cylinder with a movable piston contains 255 cm³ air at 10⁰C. At what temperature would you expect the volume to be 155 cm³ if the pressure is kept constant?

5.A car with an internal volume of 10,500 litres, drove into the river and imploded. What is the volume of the gas when 1.0 atmospheric pressure increased to 1.2 atm.?

4.You have added 10 litres of air to a balloon at 1.0 atm. What is the new volume of the balloon if you take it to a 0.90 atmospheric pressure ?

3. Robert has a 4.5 litres of gas in a piston at a pressure of 1.45 atm. What will be the new pressure inside the piston to reduce the volume of the gas to 3.60 litres?

2.  A scuba diver needs a diving tank in order to provide breathing gas while he is under water. Calculate the pressure needed for 6.50 litres of gas at 1.02 atmospheric pressure to be reduced in a 3.25 litres cylinder.