Homework Answers
As the temperature of oil and pan is different hence they are not in thermal equillibrium.
yes they are in thermal contact as heat is exchanged between them
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Oil is heated in a pan on a hot plate. The pan is in thermal equilibrium...
Thermal stability. If you’ve ever put something into a pan of hot oil or watched the...
Thermal stability. If you’ve ever put something into a pan of hot oil or watched the basket of fries being lowered in a fast food restaurant, you know what happens next. If you don’t get rid of excess moisture on the food you cook in oil, what happens? What happens to those fries when they are lowered into the hot oil? What about the molecular structure of oils makes them ideal for this kind of cooking (at least 2 reasons)?
a 20.94-g sample of an unknown metal is heated to 99.4 degrees Celsius in a hot water bath until thermal equilibrium is reached
a 20.94-g sample of an unknown metal is heated to 99.4 degrees Celsius in a hot water bath until thermal equilibrium is reached. The metal is quickly transferred to 100 mL of water at 22.0 degrees Celsius contained in a styrofoam cup. The thermal equilibrium temperature of the metal plus water mixture is 24.6 degrees Celsius. What is the Specific heat capacity of the metal?
A student heats 84.17 mL of water to 95.27°C using a hot plate. The heated water...
A student heats 84.17 mL of water to 95.27°C using a hot plate. The heated water is added to a calorimeter containing 73.92 mL of cold water. The water temperature in the calorimeter rises from J 2.15°C to 40.70°C. The specific heat capacity of water is 4.184 and the density of water is g. °C 1.00 mL Assuming that heat was transferred from the hot water to the cold water and the calorimeter, determine the heat capacity of the calorimeter....
A student heats 84.17 mL of water to 95.27°C using a hot plate. The heated water...
A student heats 84.17 mL of water to 95.27°C using a hot plate. The heated water is added to a calorimeter containing 73.92 mL of cold water. The water temperature in the calorimeter rises from J 2.15°C to 39.32°C. The specific heat capacity of water is 4.184 and the density of water is g•°C 1.00 mL Assuming that heat was transferred from the hot water to the cold water and the calorimeter, determine the heat capacity of the calorimeter. Heat...
The image below is of an aluminium plate that will be heated from the bottom. If...
The image below is of an aluminium plate that will be heated
from the bottom. If the temperature at the bottom of the plate is
600 degrees Celsius and 20 degrees at the top, how long will it
take for the top of the plate to reach 200 degrees Celsius?
Thermal conductivity = 200 W/mK
Specific heat = 921.096 J/kgK
mass of plate = 70kg
ToP 100 Battom 5 00 mm
ToP 100 Battom 5 00 mm
When two objects are in thermal contact heat energy is transferred from the hot to the...
When two objects are in thermal contact heat energy is transferred from the hot to the cold object until the temperature of both becomes equal (i.e., the objects are in thermal equilibrium). Suppose you pour 20-gram milk at 200C into a cup of 80-gram tea at 920C. Assume the specific heat of tea is 4.2 J/gram.0K and that of milk is 3.9 J/gram.0K Assuming no heat is lost into the surrounding air what is the temperature of the tea and...
10. An iron pan is used to fry a cylindrical piece of meat (mass=0.120kg, 1.50cm thickness...
10. An iron pan is used to fry a cylindrical piece of meat (mass=0.120kg, 1.50cm thickness and 10.0cm diameter). The temperature of the pan is heated to a constant temperature of 350.0°F. The thermal conductivity of the meat is 0.400W/(mK) and the emissivity of the meat is 0.900. Assume the specific heat capacity of the meat is 3500J/(kg:K). a. After the meat is placed on the pan, the temperature of Troom=70.0°F the contacting surface is raised to a constant temperature...
Two identical beakers of water are heated from 20 °C to 100 °C by two different methods: 1. By placing the first beaker...
Two identical beakers of water are heated from 20 °C to 100 °C by two different methods: 1. By placing the first beaker on a large hotplate at 100 °C 2. By placing the second beaker successively in contact with an infinite series of large hot plates. Each hot plate is at a higher temperature than the preceding one by an infinitesimally small amount. Explaining your answers full y: (a) (2 marks) How would you classify the two different methods?...
Exactly 30 mL of water at 30 °C is added to a hot frying pan made...
Exactly 30 mL of water at 30 °C is added to a hot frying pan made completely out of iron that weighs 1.5 kg. If the 30 mL of added water is converted to steam at 100 °C determine the temperature change of the frying pan. The molar heat capacity of iron is 25.19 J mol-1 K-1.
Exactly 15 mL of water at 20 °C is added to a hot frying pan made...
Exactly 15 mL of water at 20 °C is added to a hot frying pan made completely out of iron that weighs 1.5 kg. If the 15 mL of added water is converted to steam at 100 °C determine the temperature change of the frying pan. The molar heat capacity of iron is 25.19 J mol-1 K-1.
A student heats 84.17 mL of water to 95.27°C using a hot plate. The heated water is added to a calorimeter containing 73.92 mL of cold water. The water temperature in the calorimeter rises from J 2.15°C to 40.70°C. The specific heat capacity of water is 4.184 and the density of water is g. °C 1.00 mL Assuming that heat was transferred from the hot water to the cold water and the calorimeter, determine the heat capacity of the calorimeter....
A student heats 84.17 mL of water to 95.27°C using a hot plate. The heated water is added to a calorimeter containing 73.92 mL of cold water. The water temperature in the calorimeter rises from J 2.15°C to 39.32°C. The specific heat capacity of water is 4.184 and the density of water is g•°C 1.00 mL Assuming that heat was transferred from the hot water to the cold water and the calorimeter, determine the heat capacity of the calorimeter. Heat...
The image below is of an aluminium plate that will be heated
from the bottom. If the temperature at the bottom of the plate is
600 degrees Celsius and 20 degrees at the top, how long will it
take for the top of the plate to reach 200 degrees Celsius?
Thermal conductivity = 200 W/mK
Specific heat = 921.096 J/kgK
mass of plate = 70kg
ToP 100 Battom 5 00 mm
ToP 100 Battom 5 00 mm
10. An iron pan is used to fry a cylindrical piece of meat (mass=0.120kg, 1.50cm thickness and 10.0cm diameter). The temperature of the pan is heated to a constant temperature of 350.0°F. The thermal conductivity of the meat is 0.400W/(mK) and the emissivity of the meat is 0.900. Assume the specific heat capacity of the meat is 3500J/(kg:K). a. After the meat is placed on the pan, the temperature of Troom=70.0°F the contacting surface is raised to a constant temperature...
Two identical beakers of water are heated from 20 °C to 100 °C by two different methods: 1. By placing the first beaker on a large hotplate at 100 °C 2. By placing the second beaker successively in contact with an infinite series of large hot plates. Each hot plate is at a higher temperature than the preceding one by an infinitesimally small amount. Explaining your answers full y: (a) (2 marks) How would you classify the two different methods?...
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