A particular compound has an enthalpy of vaporization of 28300 J/mol. At 281 K it has a vapor pressure of 101 mmHg. What is its vapor pressure at 301 K? (R = 8.31 J/(K· mol))
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A particular compound has an enthalpy of vaporization of 28300 J/mol. At 281 K it has a vapor pressure of 101 mmHg. What is its vapor pressure at 301 K? (R = 8.31 J/(K· mol))
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- What is the density of water vapor in the air on a hot, dry day in the desert when the temperature is 40.0 °C and the relative humidity is 5.00 %? The vapor pressure of water at 40.0 °C is Py = 7.34 x 10° Pa and the molecular mass of water is M = 18.0 g/mol. Enter your answer in units of grams per cubic meter. density: g/m3If an ideal gas has a pressure of 6.590 × 10' Pa, a temperature of 43.00 °C, and a volume of 0.0127 m², how many moles n of gas are in the sample? n = mola)A gas occupies an 8.00 mL flexible-walled container. The pressure is doubled, the absolute temperature is quadrupled, and 15% of the gas leaks out. What is the new volume? b) A sample of neon has a volume of 0.730 dm3 at a temperature of 21.0 °C. and pressure of 102.5 kPa. If the density of neon is 0.900 g/dm3 at 0 °C and 101.3 kPa, what is the mass of the sample? C) the radius of a copper bar is 4mm. What force is required to stretch the rod by 20% of its length assuming that the elastic limit is not exceeded? Y= 12×10^10N/m2 2. How much heat is needed to convert 1 kg of ice at -10℃ to steam at 100℃? Remember ice and water do not have the same specific heat.
- A sealed container has a volume of 0.012 m3 and contains 26.5 g of molecular nitrogen (N2), which has a molecular mass of 28.0 u. The gas is at 157 °C. What is the absolute pressure of the nitrogen gas, in kilopascals? 1 u = 1.67 x 10-27 kg.A gas consists of NO₂ molecules at temperature T. What is the r.m.s. speed of the molecules, in m/s? The mass of an NO₂ molecule is 1.53x10-26 kg. T = 10 °C; (in m/s) OA: 639.3 OB: 747.9 OC: 875.1 OD: 1023.8 OE: 1197.9 OF: 1401.5 OG: 1639.8 OH: 1918.6A hot air balloon uses the principle of buoyancy to create lift. By making the air inside the balloon less dense then the surrounding air, the balloon is able to lift objects many times its own weight. A large hot air balloon has a maximum balloon volume of 2090 m3. a. If the air temperature in the balloon is 54 °C, how much additional mass, in kilograms, can the balloon lift? Assume the molar mass of air is 28.97 g/mol, the air density is 1.20 kg/m3, and the air pressure is 1 atm.
- If I have 2.9 L of gas at a pressure of 5.0 atm and a temperature of 50.°C, what will be the temperature of the gas if I decrease the volume of the gas to 2.4 L and change the pressure to 95.0 kPa?The vapor pressure of 1-propanol is 10.0 torr at 14.7 °C. Calculate the vapor pressure at 52.8 °C. Heat of vaporization of 1-propanol = 47.2 kJ/mol, R is the ideal gas constant = 0.008314 kJ/K+mol *(a) A gas occupies an 8.00 mL flexible-walled container. The pressure is doubled, the absolute temperature is quadrupled, and 15% of the gas leaks out. What is the new volume? (b) A sample of neon has a volume of 0.730 dm3 at a temperature of 21.0 °C. and pressure of 102.5 kPa. If the density of neon is 0.900 g/dm3 at 0 °C and 101.3 kPa, what is the mass of the sample?
- 2. 8.00 L of a gas is collected at 60.0°C. What will be its volume upon cooling to 30.0°C? 3. 4.73 L of a gas is collected at 32.0°C and 625.0 mmHg. When the temperature is changed to standard conditions, what is the new pressure?The vapor pressure is the pressure of the vapor phase of a substance when it is in equilibrium with the solid or liquid phase of the substance. The relative humidity is the partial pressure of water vapor in the air divided by the vapor pressure of water at that same temperature, expressed as a percentage. The air is saturated when the humidity is 100%. (a) The vapor pressure of water at 20.0°C is 2.34 × 10³ Pa. If the air temperature is 20.0°C and the relative humidity is 60%, what is the partial pressure of water vapor in the atmosphere (that is, the pressure due to water vapor alone)?A gas consists of NO₂ molecules at temperature T. What is the r.m.s. speed of the molecules, in m/s? The mass of an NO₂ molecule is 1.53x10-26 kg. T = 6°C; (in m/s) A: 532.9 B: 602.2 C: 680.5 D: 768.9 E: 868.9 F: 981.8 G: 1109.5 H: 1253.7 Submit Answer Tries 0/99