The water in a pressure cooker boils at a temperature greater than 100°C because it is...
The water in a pressure cooker boils at a temperature greater
than 100°C because it is under pressure. At this higher
temperature, the chemical reactions associated with the cooking of
food take place at a greater rate.
(a) Some food cooks fully in 8.00 min in a
pressure cooker at 111.0°C and in
24.0 minutes in an open pot at 100.0°C. Calculate
the average activation energy for the reactions associated with the
cooking of this food.
____kJ mol-1
(b) How long will the same food take to cook in an open pot of
boiling water at an altitude of 15000 feet, where
the boiling point of water is 84.4 °C?
______min
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The water in a pressure cooker boils at a temperature greater
than 100°C because it is...
The water in a pressure cooker boils at a temperature greater than 100°C because it is...
The water in a pressure cooker boils at a temperature greater than 100°C because it is under pressure. At this higher temperature, the chemical reactions associated with the cooking of food take place at a greater rate. (a) Some food cooks fully in 7.00 min in a pressure cooker at 120.0°C and in 70.0 minutes in an open pot at 100.0°C. Calculate the average activation energy for the reactions associated with the cooking of this food. kJ mol-1 (b) How...
The water in a pressure cooker boils at a temperature greater than 100°C because it is...
The water in a pressure cooker boils at a temperature greater than 100°C because it is under pressure. At this higher temperature, the chemical reactions associated with the cooking of food take place at a greater rate. (a) Some food cooks fully in 5.00 min in a pressure cooker at 114.0°C and in 25.0 minutes in an open pot at 100.0°C. Calculate the average activation energy for the reactions associated with the cooking of this food. _______ kJ mol-1 (b)...
Problem 8 Because pressure falls with increasing altitude, water also boils at a lower temperature. Consequently,...
Problem 8 Because pressure falls with increasing altitude, water also boils at a lower temperature. Consequently, food generally require more time to cook at higher elevations. Determine the boiling temperature of water at sea-level, 1000 m, and 2000 m above sea-level. Assume standard atmospheric conditions.
At sea level, water boils at 100 °C, and the absolute atmospheric pressure is 101 kPa....
At sea level, water boils at 100 °C, and the absolute atmospheric pressure is 101 kPa. As the atmospheric pressure above water decreases, the temperature required for boiling also decreases, at a rate of 3.1 kPa per "C. For the system shown below: a. What is the absolute atmospheric pressure at an elevation of 4100 m, assuming a constant unit weight of air of 11.80 N/m3? b. What will be the boiling temperature for water at this elevation? Elev. =...
16. At a high altitude water boils at 95°C instead of 100°C as at sea level...
16. At a high altitude water boils at 95°C instead of 100°C as at sea level because A) the atmospheric pressure is greater. B) the atmospheric pressure is less. C) the climate is cooler. D) the vapor pressure of water is greater
1. Carbon tetrachloride, CCl4, has a vapor pressure of 213 torr at 40 °C and 836...
1. Carbon tetrachloride, CCl4, has a vapor pressure of 213 torr at 40 °C and 836 torr at 80 °C. What is the normal boiling point of CCl4? 2. Pressure cookers allow food to cook faster because the higher pressure inside the pressure cooker increases the boiling temperature of water. A particular pressure cooker has a safety valve that is set to vent steam if the pressure exceeds 3.4 atm. What is the approximate maximum temperature that can be reached...
"igure 1.2 Comparison of the Three Common Temperature Scales 373K 100°C 212F - Water Boils 100...
"igure 1.2 Comparison of the Three Common Temperature Scales 373K 100°C 212F - Water Boils 100 degrees — 100 degrees 180 degrees 98.6°F Normal Body Temperature - Water Freezes 273K 0°C 327 Kelvin Celsius Fahrenheit Graphical Question 1.2 The following Celsius vs. Fahrenheit data is obtained. 0.0 10.0 25.0 100.0 32.0 50.0 77.0 212.0 Using excel plot the data and determine the equation that relates Fahrenheit to Celsius.
QUESTION 6 At a pressure of 4 Mpa, the temperature at which liquid water boils (using...
QUESTION 6 At a pressure of 4 Mpa, the temperature at which liquid water boils (using tables) is: Saturated warter- Pressure table TA TABLE A-6 Specific volume, m/kg Superheated water (Continued) Sat. Sat. Sat. C m/kg kJ/kg kJkg kJ/kg K Press., temp., liquid, vapor P- 4.0 MPa (250.35 C) Sat. 0.04978 2601.7 2800.8 6.0696 3500 242.56 0.001235 0.057061 275 0.05461 2668.9 2887.3 6.2312 4000 250.35 0.001252 0.049779 300 0.05887 2726.2 2961.7 6.3639 5000 263.94 0.001286 0.039448 350 0.06647 2827.4 3093.3...
check each statement about the temperature, check each item that is a unit of pressure, which...
check each statement about the temperature, check each item that is
a unit of pressure, which of the following pairs of substances are
held together by hudrogen bonds, multiple choice, name the phase
16. Check each true statement about the temperature 0 K. The K stands for kilo. The K stands for Kelvin. This is a temperature that is suitable for biological processes. It is absolute zero. This temperature is the middle of the Kelvin scale. This is the coldest...
compressibility and In comparing gases with liquids, gases have A) greater; smaller D) smaller; greater density....
compressibility and In comparing gases with liquids, gases have A) greater; smaller D) smaller; greater density. C) Smaller; smaller B) greater; greater E) none of the above Which process is exothermic? A) solidgas D) gas B) liquidgas E) none of the above Csolid liquid liquid Which pair of molecules has hydrogen bond interactions? ) NH3 and CH4 ) CO2 and CO2 B NH3 and C2H5OHC) CH4 and CH4 E) CO2 and CH4 hich combination of characteristics is most likely to...
The water in a pressure cooker boils at a temperature greater than 100°C because it is under pressure. At this higher temperature, the chemical reactions associated with the cooking of food take place at a greater rate. (a) Some food cooks fully in 7.00 min in a pressure cooker at 120.0°C and in 70.0 minutes in an open pot at 100.0°C. Calculate the average activation energy for the reactions associated with the cooking of this food. kJ mol-1 (b) How...
At sea level, water boils at 100 °C, and the absolute atmospheric pressure is 101 kPa. As the atmospheric pressure above water decreases, the temperature required for boiling also decreases, at a rate of 3.1 kPa per "C. For the system shown below: a. What is the absolute atmospheric pressure at an elevation of 4100 m, assuming a constant unit weight of air of 11.80 N/m3? b. What will be the boiling temperature for water at this elevation? Elev. =...
16. At a high altitude water boils at 95°C instead of 100°C as at sea level because A) the atmospheric pressure is greater. B) the atmospheric pressure is less. C) the climate is cooler. D) the vapor pressure of water is greater
1. Carbon tetrachloride, CCl4, has a vapor pressure of 213 torr at 40 °C and 836 torr at 80 °C. What is the normal boiling point of CCl4? 2. Pressure cookers allow food to cook faster because the higher pressure inside the pressure cooker increases the boiling temperature of water. A particular pressure cooker has a safety valve that is set to vent steam if the pressure exceeds 3.4 atm. What is the approximate maximum temperature that can be reached...
"igure 1.2 Comparison of the Three Common Temperature Scales 373K 100°C 212F - Water Boils 100 degrees — 100 degrees 180 degrees 98.6°F Normal Body Temperature - Water Freezes 273K 0°C 327 Kelvin Celsius Fahrenheit Graphical Question 1.2 The following Celsius vs. Fahrenheit data is obtained. 0.0 10.0 25.0 100.0 32.0 50.0 77.0 212.0 Using excel plot the data and determine the equation that relates Fahrenheit to Celsius.
QUESTION 6 At a pressure of 4 Mpa, the temperature at which liquid water boils (using tables) is: Saturated warter- Pressure table TA TABLE A-6 Specific volume, m/kg Superheated water (Continued) Sat. Sat. Sat. C m/kg kJ/kg kJkg kJ/kg K Press., temp., liquid, vapor P- 4.0 MPa (250.35 C) Sat. 0.04978 2601.7 2800.8 6.0696 3500 242.56 0.001235 0.057061 275 0.05461 2668.9 2887.3 6.2312 4000 250.35 0.001252 0.049779 300 0.05887 2726.2 2961.7 6.3639 5000 263.94 0.001286 0.039448 350 0.06647 2827.4 3093.3...
check each statement about the temperature, check each item that is
a unit of pressure, which of the following pairs of substances are
held together by hudrogen bonds, multiple choice, name the phase
16. Check each true statement about the temperature 0 K. The K stands for kilo. The K stands for Kelvin. This is a temperature that is suitable for biological processes. It is absolute zero. This temperature is the middle of the Kelvin scale. This is the coldest...
compressibility and In comparing gases with liquids, gases have A) greater; smaller D) smaller; greater density. C) Smaller; smaller B) greater; greater E) none of the above Which process is exothermic? A) solidgas D) gas B) liquidgas E) none of the above Csolid liquid liquid Which pair of molecules has hydrogen bond interactions? ) NH3 and CH4 ) CO2 and CO2 B NH3 and C2H5OHC) CH4 and CH4 E) CO2 and CH4 hich combination of characteristics is most likely to...
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