1) If a volume of air is warmed, it expands. If a volume of air expands,...
1) If a volume of air is warmed, it expands. If a volume of air expands, it
warms or cools?
2) Food cooked in boiling water in the mountains cooks slower than when cooked at sea level. If the temperature under the pot is increased, the food will cook
slower, faster or neither?
Homework Answers
1. it cools.
2. Neither .
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1) If a volume of air is warmed, it expands. If a volume of air
expands,...
Write neat please. Show step by step please. Read instructions carefully. do all problems please. double...
Write neat please. Show step by step please. Read
instructions carefully. do all problems please. double check your
work. Box in answer please. Thank you
Question 21 1 pts A kilogram block of iron at 40 °C is placed into a kilogram of water at 20°C. The final temperature of the two becomes O more than 30 °C. O at or about 30 °C. o less than 30 °C. Question 22 1 pts At the same temperature, which move with...
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 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...
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)...
Energy Chemistry Guided Practice Date: Group: Name: Energy Answer the questions below. the stove, A student...
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Write neat please. Show step by step please. Read instructions carefully. do all problems please. double...
Write neat please. Show step by step please. Read
instructions carefully. do all problems please. double check your
work. Box in answer please. Thank you
Question 25 1 pts A volume of air has temperature of O°C. An equal volume of air that is twice as hot has a temperature of O2°C O 100°C OOºC O 273°C Question 26 1 pts If you wish to cool your kitchen on a hot day by operating your refrigerator with its door open,...
Conceptual What happens to the temperature when the water reaches its melting point? 1. 1. Create a heating cur...
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Classwork: Ch. 6 Thermodynamics 1. A sample of nitrogen expands in volume from 1.6 L to...
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part a. The air in an inflated balloon (defined as the system) is warmed over a toaster and absorbs 110 J of heat. As it...
part a. The air in an inflated balloon (defined as the system) is warmed over a toaster and absorbs 110 J of heat. As it expands, it does 79 kJ of work. What is the change in internal energy for the system? Express the energy in kilojoules to two significant figures. part b. When fuel is burned in a cylinder equipped with a piston, the volume expands from 0.235 L to 1.350 L against an external pressure of 1.02 atm...
Review Constants Periodic Table Air consists mostly of nitrogen (N), with a molecular mass of 28, and oxygen (O2),...
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Write neat please. Show step by step please. Read
instructions carefully. do all problems please. double check your
work. Box in answer please. Thank you
Question 21 1 pts A kilogram block of iron at 40 °C is placed into a kilogram of water at 20°C. The final temperature of the two becomes O more than 30 °C. O at or about 30 °C. o less than 30 °C. Question 22 1 pts At the same temperature, which move with...
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...
Energy Chemistry Guided Practice Date: Group: Name: Energy Answer the questions below. the stove, A student is cooking macaroni and cheese for dinner. The student places a pot on boils water in the pot, places noodles in the boiling water, and watches the sink in the pot. Explain the types of heat transfer that are occurring as the noodles. 1. student cooks the A young child opens the refrigerator door and stands there for several minutes looking for something to...
Write neat please. Show step by step please. Read
instructions carefully. do all problems please. double check your
work. Box in answer please. Thank you
Question 25 1 pts A volume of air has temperature of O°C. An equal volume of air that is twice as hot has a temperature of O2°C O 100°C OOºC O 273°C Question 26 1 pts If you wish to cool your kitchen on a hot day by operating your refrigerator with its door open,...
Conceptual What happens to the temperature when the water reaches its melting point? 1. 1. Create a heating curve of temperature v. time for water in Exploration 1. Select three different colors to represent changes in temperature over time as the heat energy input changes in each of the three trials. How does varying the heat energy affect the resulting temperature v. time graph? You can attach your graph or just state your observation based on the question asked. Conceptual...
Classwork: Ch. 6 Thermodynamics 1. A sample of nitrogen expands in volume from 1.6 L to 5.4 L at constant temperature. What is the work in joules if the gas expands (a) against a vacuum and (b) against a constant pressure of 3.7 atm? 2. How much heat is evolved (given off) when 266 g of white phosphorus (P) burn in air? P, (s) + 50,0) - P.O.(s) AH--3013 kJ/mol 3. Benzene (CH) burns in oxygen to produce carbon dioxide...
Review Constants Periodic Table Air consists mostly of nitrogen (N), with a molecular mass of 28, and oxygen (O2), with a molecular mass of 32. A water molecule (H,O) has molecular mass 18. According to the ideal gas law (N/ V P /KT), dry air at a particular pressure and temperature has the same particle density (number of particles per unit volume) as humidait at the same pressure and temperature. Consequently, humidair, whose low-mass water molecules replace more massive nitrogen...
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