1. If 3.00 m3 of a gas initially at STP is placed under a pressure of 3.20 atm, the temperature of the gas rises to 38.0°C. What is the volume?
(1. Jika 3 m3 gas mula-mula pada keadaan STP di letakkan dibawah tekanan 3.2 atm, temperatur gas meningkat menjadi 38°C. Berapa volume akhir gas?)
2. In an internal combustion engine, air at atmospheric pressure and a temperature of about 20°C is compressed in the cylinder by a piston to 1/9 of its original volume(compression ratio = 9.0). Estimate the temperature of the compressed air, assuming the pressure reaches 40 atm.
(2. Didalam mesin pembakaran, udara pada tekanan atmosfer dan suhu sekitar 20°C sedang ditekan didalam tabung oleh piston menjadi 1/9 dari volume original (perbandingan penekanan = 9.0). Perkirakan suhu akhir udara, asumsikan tekanan mencapai 40 atm.)
3. Calculate the density of oxygen at STP using the ideal gas law
(3. Hitung massa jenis oksigen pada STo menggunakan teori gas ideal)
4. A storage tank contains 21.6 kg of nitrogen (N2) at an absolute pressure of 3.65 atm. What will the pressure be if the nitrogen is replaced by an equal mass of CO2?
(4. Sebuah tangki penyimpanan menyimpan 21.6 kg nitrogen (N2) pada tekanan absolut 3.65 atm. Berapa tekanan akhir apabila nitrogen diganti dengan CO2 dengan massa yang sama?)
5. A storage tank at STP contains 18.5 kg of nitrogen (N2).
a. What is the volume of the tank?
b. What is the pressure if an additional 15.0 kg of nitrogen is added without changing the temperature?
5. Sebuah tangki penyimpanan pada STP menyimpan 18.5 kg nitrogen (N2).
a. Berapa volume tangki?
b. Berapa tekanan jika diberikan penambahan 15 kg nitrogen tanpa mengubah temperatur?
6. If 18.75 mol of helium gas is at 10.0°C and a gauge pressure of 0.350 atm,
a. Calculate the volume of the helium gas under these conditions.
b. Calculate the temperature if the gas is compressed to precisely half the volume at a gauge pressure of 1.00 atm.
(6. Jika 18.75 mol gas helium pada 10.0°C dan tekanan gauge adalah 0.35 atm,
a. Hitung volume gas helium pada kondisi ini.
b. Hitung temperatur jika gas ditekan menjadi setengah dari volume pada tekanan gauge 1 atm.
7. What is the pressure inside a 35.0-L container holding 105.0 kg of argon gas at 385 K?
(7. Berapa tekanan didalam 35 L tempat penyimpanan berisi 105 kg gas argon pada 385 K?)
8. A tank contains 26.0 kg of O2 gas at a gauge pressure of 8.70 atm. If the oxygen is replaced by helium, how many kilograms of the latter will be needed to produce a gauge pressure of 7.00 atm?
(8. Sebuah tangki berisi 26 kg gas O2 pada tekanan gauge 8.7 atm. Jika oksigen diganti dengan helium, berapa kilogram helium akan diperlukan untuk menghasilkan tekanan gauge 7 atm?)
9. Calculate the number of molecules/m3 in an ideal gas at STP.
10. How many moles of water are there in 1.000 L? How many molecules?
11. Estimate the number of a). moles, and b). molecules of water in all the Earth’s oceans. Assume water covers 75% of the Earth to an average depth of 3 km.
12. A cubic box of volume 5.1 × 10-2 m3 is filled with air at atmospheric pressure at 20°C. The box is closed and heated to 180°C. What is the net force on each side of the box?
13. Estimate how many molecules of air are in each 2.0-L breath you inhale that were also in the last breath Galileo took. [Hint: Assume the atmosphere is about 10 km high and of constant density.
