Exam 16: Temperature and Heat

A 400-g stainless steel tea kettle containing 500 g of water is on the stove.The portion of the tea kettle that is in contact with the heating element has an area of 0.090 m² and is 2.0 mm thick.At a certain moment,the temperature of the water is 75°C,and it is rising at the rate of 3.0°C per minute.What is the difference in temperature between the inside and the outside of the bottom of the tea kettle? Assume that the inner surface of the kettle is at the same temperature as the water inside.The thermal conductivity of stainless steel is 16.3 W/m ∙ K,the specific heat of the steel is 448 J/kg ∙ K,and the specific heat of water is 4186 J/kg ∙ K.

Express -40°C in °F.

A 0.600-kg piece of metal X is heated to 100°C and placed in an aluminum can of mass 0.200-kg which contains 0.500 kg of water initially at 17.3°C.The final equilibrium temperature of the mixture is 20.2°C,what is the specific heat of metal X? The specific heats of water and aluminum are 4186 J/kg ∙ K (water)and 910 J/kg ∙ K (aluminum).

A heat-conducting rod that is wrapped in insulation is constructed with a 0.15-m length of alloy A and a 0.40-m length of alloy B,joined end-to-end.Both pieces have cross-sectional areas of 0.0020 m².The thermal conductivity of alloy B is known to be 1.8 times as great as that for alloy A.The end of the rod in alloy A is maintained at a temperature of 10°C,and the other end of the rod is maintained at an unknown temperature.When steady state flow has been established,the temperature at the junction of the alloys is measured to be 40° C,and the rate of heat flow in the rod is measured at 56 W.What is the thermal conductivity of alloy A?

For the mercury in a thermometer to expand from 4.00 cm³ to 4.10 cm³,what change in temperature is necessary? The mercury has a volume expansion coefficient of 1.80 × 10^-4 K^-1.

Oxygen condenses into a liquid at approximately 90 K.What temperature,in degrees Fahrenheit,does this correspond to?

Consider a flat steel plate with a hole through its center as shown in the figure.When the temperature of the plate is increased,the hole will

A 6.5-g iron meteor hits the earth at a speed of 295 m/s.If its kinetic energy is entirely converted to heat in the meteor,by how much will its temperature rise? The specific heat of iron is 113 cal/kg ∙ °C,and .

A solid concrete wall has dimensions 4.0 m × 2.4 m and is 30 cm thick.The thermal conductivity of the concrete is 1.3 W/m ∙ K,and it separates a basement from the ground outside.The inner surface of the wall is at 18°C,and the outside surface is at 6°C.How much heat flows through the wall every hour?

A 920-g empty iron kettle is put on a stove.How much heat in joules must it absorb to raise its temperature form To The specific heat for iron is 113 cal/kg ∙ °C,and 1 cal = 4.186 J.

The density of water at 0°C is 999.84 kg/m³ and at 4°C it is 999.96 kg/m³.A 1.0-L container,full to the brim with water at 4.0°C is placed in the refrigerator.By the time that the temperature of the water reaches 0.0°C,what volume of water has spilled from the container,assuming that the contraction of the container is negligible?

If,with steady state heat flow established,you double the thickness of a wall built from solid uniform material,the rate of heat loss for a given temperature difference across the thickness will

The weather outside is frightful.The temperature is -22°F.What is the corresponding temperature in the Celsius scale?

A glass beaker of unknown mass contains Of water.The system absorbs Of heat and the temperature rises As a result.What is the mass of the beaker? The specific heat of glass is ,and that of water is 1.0 cal/g ∙ °C.

The coefficient of linear expansion for aluminum is 1.8 × 10^-6 K^-1.What is its coefficient of volume expansion?

A lab assistant pours 330 g of water at 45°C into an 855-g aluminum container that is at an initial temperature of 10°C.The specific heat of aluminum is And that of water is 4186 J/kg ∙ K.What is the final temperature of the system,assuming no heat is exchanged with the surroundings?

The volume coefficient of thermal expansion for gasoline is 950 × 10^-6 K^-1.By how many cubic centimeters does the volume of 1.00 L of gasoline change when the temperature rises from 30°C to 50°C?

In a flask,114.0 g of water is heated using Of power,with perfect efficiency.How long will it take to raise the temperature of the water from To The specific heat of water is 4186 J/kg ∙ K.

Some properties of a certain glass are listed here: Density 2300 kg/m³ Specific heat capacity 840 J/kg ∙ °C Coefficient of thermal expansion 8.5 × 10^-6 (°C)^-1 Thermal conductivity 0.80 W/m ∙ °C A glass window pane is 2.7 m high,2.4 m wide,and 9.0 mm thick.The temperature at the inner surface of the glass is And at the outer surface 4°C.How much heat is lost each hour through the window?

Which two temperature changes are equivalent?