change in its density for a ° C rise in temperature ? . A kW drilling machine is used to drill a bore in a small aluminium block of mass . kg.
How much is the rise in temperature of the block in . minutes, assuming % of power is used up in heating the machine itself or lost to the surroundings. Specific heat of aluminium = . J g – K – .
. A copper block of mass . kg is heated in a furnace to a temperature of ° C and then placed on a large ice block. What is the maximum amount of ice that can melt?
(Specific heat of copper = . J g – K – ; heat of fusion of water = J g – ). . In an experiment on the specific heat of a metal, a .
kg block of the metal at ° C is dropped in a copper calorimeter (of water equivalent . kg) containing cm of water at ° C. The final temperature is ° C. Compute the specific heat of the metal.
If heat losses to the surroundings are not negligible, is your answer greater or smaller than the actual value for specific heat of the metal ? . Given below are observations on molar specific heats at room temperature of some common gases. Gas Molar specific heat (C v ) ( cal mo1 – K – ) Hydrogen .
Nitrogen . Oxygen . Nitric oxide . Carbon monoxide .
Chlorine . The measured molar specific heats of these gases are markedly different from those for monatomic gases. Typically, molar specific heat of a monatomic gas is . cal/mol K.
Explain this difference. What can you infer from the somewhat larger (than the rest) value for chlorine ? . A child running a temperature of ° F is given an antipyrin (i.e.
a medicine that lowers fever) which causes an increase in the rate of evaporation of sweat from his body. If the fever is brought