A double boiler is used when a careful control of temperature is required in cooking. Water is boiled in an outside container to produce steam, and the steam condenses on the outside walls of an inner container in which cooking occurs. (A related laboratory device is called a steam bath.) (a) How is heat energy conveyed to the food to be cooked in a double boiler? (b) What is the maximum temperature that can be reached in the inside container?
CHE107- Chapter 2 - 9/4 i. Atomic theory - what’s an atom ii. atomic no’s, mass numbers, and isotopes iii. atomic weight iv. periodic table of elements v. ions and ionic compounds vi. molecules and molecular compounds vii. nomenclature Dalton’s Atomic Theory 1803 - - All matter is composed of indivisible subunits - atoms** - atoms retain their identity during chemical reactions - an element is composed of only one type of atom - ie. C, Na, H2 - A compound is composed of atoms of two or more elements combined in ﬁxed proportions - H2O - A chemical reaction the rearrangement of the atoms to give new combos - i.e. carbon+oxy -> carbon dioxide - C + O2 -> CO2 Law of Deﬁnite Proportions - When two elements form multiple compounds the masses of one element relative to a ﬁxed ma