Science Quarter 4 Reviewer, Lecture notes of Earth science

Download Science Quarter 4 Reviewer and more Lecture notes Earth science in PDF only on Docsity! SCIENCE REVIEWER 1. According to Boyle’s Law, at constant temperature, as the pressure of a given sample of gas is increased, the volume will? - Decrease 2. As per Charles' Law, if temperature of any gas is increased, its volume will? - increase 3. Volume (V) is the amount of space occupied by the matter. Which of the following has a compressible volume? - an inflated balloon 4. You have a gas that has a pressure of 2 atm and a volume of 10 L. What would be the new volume if the pressure was changed to 1 atm? - P1V1=P2V2 - (2atm)(10L)=(1atm)V2 - (2atm)(10L)/1atm=1atmV2/1atm - V2=20L 5. A sample of a gas has a volume of 852 mL at 293 K. What temperature is necessary for the gas to have a volume of 945 mL? - V1/T1=V2/T2 - 852mL/298k=945mL/T2 then numerator times numerator then denominator - 281,610=(852mL)T2 - 281,610/852mL=(852mL)T2/852mL - T2=330.5k 6. At standard temperature and pressure, the values of temperature, volume, and pressure are: - 273 K; 22.4 L and 1 atm 7. When you open a can or a bottle of softdrinks, a fizzing sound is produce because of the escaping dissolved carbon dioxide. What change has happened in the process? - change in pressure 8. A gas occupies 12.3 liters at a pressure of 40.0 mmhg, What is the volume when the pressure is increased to 60.0 mmhg? - P1V1/P2V2 - (12.3L)(40.0mmhg)=P1(60.0mmhg) - 492=P1(60.00mmhg) - 492/60.0mmhg=(60.0mmhg) P1/ 60.0mmhg - P2=8.2L 9. If a gas at 25.0°C occupies 3.60L at a pressure of 1.00atm, what will be its volume at a pressure of 2.50atm - P1V1/P2V2 - (1.00atm)(3.60L)=(2.50atm)V2 - 3.60=(2.50atm)V2 - 3.60/2.50atm=(2.50atm)V2/2.50atm - V2=1.44L 10. A gas occupies 11.2 liters at 0.860 atm. What is the pressure if the volume becomes 15.0 L? - P1V1/P2V2 - (0.860atm)(11.2L)=P1(15.0L) - 9.632=P1(15.0L) - 9.632/15.0L=P1(15.0L)/15.0L - P1=0.64atm 11. As the volume of confined gas decreases at the constant temperature, the pressure exerted by the gas… - increases 12. If the temperature is kept constant, how can we increase the pressure of a gas? - decrease the container volume 13. What happens to the volume of gas if temperature increased? - increases 14. What is the value of R in atm-l/mol-K? - 0.08206 15. What is the relationship between pressure and temperature in Gay-tussac’s law? - For a fixed amount of gas at a constant volume, the pressure is directly proportional to the absolute temperature. 16. Boyle’s Law describes the relationship between the pressure and the …. of a gas at a constant temperature. - Volume 17. According to Charle’s Law, if the temperature lf a gas is doubled at constant temperature, what happen to its volume? - It doubles 18. Gay-Lussac’s Law states that the pressure of a gas is directly proportional to its? - temperature 19. If the temperature of a gas remains constant but pressure is decreased, the volume will: - increase 20. Avogadro states that equal of gases under the same conditions of temperature and pressure have equal? - number of molecules 21. What happens to the kinetic energy of particles as the velocity increases? - increases 22. What happens to the volume of a gas when it is compressed? - the volume decreases 23. SI standard unit for pressure - Pascal 24. If a balloon is pressed, what happens to the pressure of the gas inside the balloon? - increases 25. What must remain constant if Charles’ Law is to be applied to a given sample of gas? - pressure