Exam 14: Heat

A 100 gram glass container contains 200 grams of water at 10 $^{\circ}$ C.A 200 gram piece of lead at 150 $^{\circ}$ C is added to the water in the container.What is the final temperature of the system? (specific heat of water = 4,186 J/kg $^{\circ}$ C,specific heat of glass = 837.2 J/km $^{\circ}$ C,specific heat of lead = 127.7 J/km $^{\circ}$ C)

A 100 gram glass container contains 200 grams of water and 100 grams of ice all at 0 $^{\circ}$ C.A 200 gram piece of lead at 100 $^{\circ}$ C is added to the water and ice in the container.What is the final temperature of the system? (specific heat of ice = 2,000 J/kg $^{\circ}$ C ,specific heat of water = 4,186 J/kg $^{\circ}$ C,heat of fusion of water = 333.7 kJ/kg,specific heat of glass = 837.2 J/km $^{\circ}$ C,specific heat of lead = 127.7 J/km $^{\circ}$ C)

If the temperature of the sun is 5800 K,then what is wavelength where the blackbody radiation is a maximum?

Radiant energy from the Sun reaches the Earth at a rate of 1.70 $\times$ 10¹⁷ W.When 30.0% of the radiant energy is reflected and 70.0% absorbed,the average temperature of the Earth's atmosphere is 253 K or -20.0 $^{\circ}$ C.If the atmosphere reflected 40.0% and absorbed 60.0% of the solar radiant energy,then what is the average temperature of the Earth's atmosphere?

200 Joules of heat flows into a 35.0 g sample.If the temperature increases by 10.0 $^{\circ}$ C,then what is the specific heat capacity of the sample,in J/kg $^{\circ}$ C?

A primitive space heater consists of a 10.0 cm radius iron ball through which electrical current was passed in order to heat the ball and subsequently the surrounding air.If the temperature of the iron ball was kept at 530 K and the room temperature was 20 $^{\circ}$ C,what power would be radiated into the room? Assume the ball is a perfect blackbody.

An outer surface of a wood burning stove in a cabin is at a temperature of 150 $^{\circ}$ C.What is the wavelength where the blackbody is a maximum?

A runner is running a kilometer in 8.30 seconds in still,dry air at a temperature of 25.0 $^{\circ}$ C.Her skin has a temperature of 35.0 $^{\circ}$ C and an exposed area is 1.00 m².If the convective coefficient is 22.0 W/m² $^{\circ}$ C,then what is the rate of heat flow from her skin to the air?

If the temperature of 2.000 moles of an ideal gas is increased by 50 $^{\circ}$ C,then what is the increase in the total internal energy?

What form of convection causes the offshore sea breeze in the evening?

A tungsten light bulb is glowing with blackbody radiation whose maximum occurs at a wavelength of 700.0 nm.What is the temperature of the tungsten element?

The heat of fusion for gold at 1,063 $^{\circ}$ C is 66.6 kJ/kg and the specific heat of gold is 0.128 kJ/kg $^{\circ}$ C.What is the energy needed to melt 100 grams of gold starting at 0 $^{\circ}$ C?

A student is sleeping under a small goose-down comforter that has coefficient of thermal conductivity of 0.025 W/m $^{\circ}$ C.The thickness of the down comforter is 5.0 cm and the area of the comforter is 2.0 m².If the temperature difference between inside of the comforter and the outside of the comforter 40 $^{\circ}$ C,then what is the rate of heat flow through the comforter?

The specific heat of ice is 2.10 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,the heat of vaporization of water at 100 $^{\circ}$ C is 2,256 kJ/kg,and the specific heat of steam is 2.020 kJ/kg $^{\circ}$ C.What is the final equilibrium temperature when 10.0 grams of ice at -15.0 $^{\circ}$ C is mixed with 2.00 grams of steam at 120 $^{\circ}$ C?

A rigid cylinder (15 cm radius,15 cm height)contains nitrogen gas (N₂)at standard temperature and pressure.What is the total translational kinetic energy of the gas molecules in the cylinder?

To use 100 Calories of energy,how high would an 80.0 kg person have to climb?

A 100 g glass container is at 10.0 $^{\circ}$ C.200 g of water at 90.0 $^{\circ}$ C is added to the glass container.What is the final temperature of the water and the glass,in $^{\circ}$ C? (specific heat of water = 1.00 cal/g $^{\circ}$ C,specific heat of glass = .200 cal/gm $^{\circ}$ C)

A 100 g glass container contains 250 g of water at 15.0 $^{\circ}$ C. A 20.0 g piece of lead at 100 $^{\circ}$ C is added to the water in the container. What is the final temperature of the system in $^{\circ}$ C? (specific heat of water = 1.00 cal/g $^{\circ}$ C,specific heat of glass = 0.200 cal/g $^{\circ}$ C,specific heat of lead = 0.0310 cal/gm $^{\circ}$ C)

A 100 gram aluminum container is at 15.0 $^{\circ}$ C.150 grams of water at 80.0 $^{\circ}$ C is added to the aluminum container.What is the final temperature of the water and the aluminum? (specific heat of water = 1.00 cal/g $^{\circ}$ C,specific heat of aluminum = 0.215 cal/gm $^{\circ}$ C)

The specific heat of ice is 2.10 kJ/kg $^{\circ}$ C,the heat of fusion for ice at 0 $^{\circ}$ C is 333.7 kJ/kg,the specific heat of water 4.186 kJ/kg $^{\circ}$ C,and the heat of vaporization of water at 100 $^{\circ}$ C is 2,256 kJ/ kg.What is the final equilibrium temperature when 30.0 grams of ice at -15.0 $^{\circ}$ C is mixed with 8.00 grams of steam at 100 $^{\circ}$ C?