AP Physics B. Temperature & Heat. Joseph Black (1728-1799). English chemist (re-)discovered carbon dioxide (“fixed air”) Founder of calorimetry technique Proposed a theory of heat that did not reference phlogiston, including: The heat equation Specific heat capacity & Latent heat
Temperature & Heat
The Eiffel Tower, constructed in 1889 by Alexandre Eiffel, is an impressive latticework structure made of iron. If the tower is 301 m high on a 22 ºC day, how much does its height decrease when the temperature cools to 0.0 ºC?
A copper flask with volume of 150 cm3 is filled to the brim with olive oil. If the temperature of the system is increased from 6.0 ºC to 31 ºC, how much oil spills from the flask?
1 kcal = 1 Cal = 1000 cal = 4186 J
Conduction – the process whereby heat is transferred by direct contact through a material, any bulk motion of the material playing no role in the transfer.
Q/t can be defined as “rate of heat transfer”, H
this is the form on the AP equation sheet
One of the windows in a house has the shape of a square 1.0 m on a side. The glass in the window is 0.50 cm thick. How much heat is lost through this window in one day if the temperature in the house is 21 °C and the temperature outside is 0.0 °C? (The thermal conductivity of glass is 0.84 W/(m·K).)
Two 0.525 m rods, one lead and the other copper, are connected between metal plates help at 2.00 °C and 106 °C. The rods have a square cross section, 1.50 cm on a side. How much heat flows through the two rods in 1.00 s? Assume no heat is exchanged between the rods and the surroundings, except at the ends. (The thermal conductivity of lead is 34.3 W/(m·K) and the thermal conductivity for copper is 395 W/(m·K).)