The enthalpy of vaporization for methanol is 35.2 kJ/mol. Methanol has a vapor pressure of 1 atm at 64.7 oC. Using the Clausius-Clapeyron equation, what is the vapor pressure for methanol at 31.9 oC? Give your answer in atmospheres, to the third decimal point.
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The enthalpy of vaporization for methanol is 35.2 kJ/mol. Methanol has a vapor pressure of 1 atm at 64.7 oC. Using the Clausius-Clapeyron equation, what is the vapor pressure for methanol at 31.9 oC? Give your answer in atmospheres, to the third decimal point.
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- What is the vapor pressure of benzene at its normal boiling point (80.1 °C)? Be sure your answer has the correct number of significant digits. mmHg x10 XConsider the melting points of the substances below (see figures for two compounds). Explain the trend in melting point using your knowledge of intermolecular forces. (In the structures below, carbon is black, hydrogen is white, and oxygen is red.) Substance Melting Point (°C) Molar Mass (g/mol) Cl2 −102 71 Ethyl formate (CH3CH2OCHO) −80 74 Propionic acid (CH3CH2COOH) −20 74 Br2 −7.2 160The enthalpy of vaporization for methanol is 35.2 kJ/mol. Methanol has a vapor pressure of 1 atm at 64.7 °C. Using the Clausius-Clapeyron equation, what is the vapor pressure for methanol at 59.2 °C? Give your answer in atmospheres, to the third decimal point.
- How much heat, in joules and in calories, must be added to a 89.1 g chromium block with a specific heat of 0.450 J/g·°C to increase its temperature from 25°C to its melting temperature of 1907°C?A 0.439 mol sample of liquid propanol (60.09 g/mol) is heated from 25.6°C to 328.3PC. The boiling point of propanol is 206.6°C. The specific heat of liquid propanol is 2.40 J/g°C. The specific heat of propanol vapor is 1.42 J/g°C. The enthalpy of vaporization for propanol is 47.5 kJ/mol. What is the energy change of this process, in kJ?There are three sets of sketches below, showing the same pure molecular compound (hydrogen chloride, molecular formula HCI) at three different temperatures. The sketches are drawn as if a sample of hydrogen chloride were under a microscope so powerful that individual atoms could be seen. Only one sketch in each set is correct. Use the slider to choose the correct sketch in each set. You may need the following information: melting point of HCl: – 114.8 °C boiling point of HCl: -85.1 °C 00 A C (Choose one) (Choose one) (Choose one) ol. | 2 3 4 5 - 10. °C – 132. °C -89. °C JAN 14 MacBook Air 80 88 DI DD F11 F1 F2 F4 F5 F6 F7 F8 F9 F10 F3
- Use vapor pressure. A student leaving campus for spring break wants to make sure the air in his dorm room has a high water vapor pressure so that his plants are comfortable. The dorm room measures 3.41 mx 4.41 m x 3.90 m and the student places a pan containing 0.874 L of water in the room. Assume that the room is airtight, that there is no water vapor in the air when he closes the door, and that the temperature remains a constant 22 °C. The vapor pressure of water at 22 °C is 19.8 mm Hg. (a) Calculate the pressure that the water vapor would exert if all of the liquid water evaporated. mm Hg (b) Will all of the water in the pan evaporate? [Use vapor pressure. A student leaving campus for spring break wants to make sure the air in her dorm room has a high water vapor pressure so that her plants are comfortable. The dorm room measures 3.76 m × 4.17 m × 3.31 m and the student places a pan containing 1.62 L of water in the room. Assume that the room is airtight, that there is no water vapor in the air when she closes the door, and that the temperature remains a constant 25 °C. The vapor pressure of water at 25 °C is 23.8 mm Hg. (a) Calculate the pressure that the water vapor would exert if all of the liquid water evaporated. mm Hg (b) Will all of the water in the pan evaporate?What mass of steam initially at 130 °C is needed to warm 200. g of water in a 100. g glass container from 20.0 °C to 50.0 °C? The heat of vaporization of water is 2260 J g–1 . The specific heat of steam is 2.010 J g–1 °C
- Which of the following compounds has the highest vapor pressure at 25°C? O acetic acid, boiling point- 118 C carbon tetrachloride, boiling point = 76.7 C Omethanol, boiling point- 65.0 C O pentane, boiling point = 36.1 C O ethanol, boiling point= 78.7 CThere are three sets of sketches below, showing the same pure molecular compound (ammonia, molecular formula NH3) at three different temperatures. The sketches are drawn as if a sample of ammonia were under a microscope so powerful that individual atoms could be seen. Only one sketch in each set is correct. Use the slider to choose the correct sketch in each set. You may need the following information: melting point of NH3: -77.7 °C boiling point of NH3: -33.3 °C (Choose one) (Choose 1 2 3 4 5 I B - 59. °℃ one) (Choose one) (Choose one) 1 2 3 41. °C I 5 1 3 4 5 I -89. °℃Carbon disulfide has a vapor pressure of 363 torr at 25 °C and a normal boiling point of 46.3 °C. Find ΔHvapΔHvap for carbon disulfide.