Question

A 54.5 g block of an unknown metal is heated in a hot water bath to 100.0°C. When the block is placed in an insulated vessel containing 130.0 g of water at 25.0°C, the final temperature is 28.0°C. Determine the specific heat of the unknown metal. The c_s for water is 4.18 J/g°C.

If 1495 J of heat is needed to raise the temperature of a 357 g sample of a metal from 55.0°C to 66.0°C, what is the specific heat capacity of the metal?

The flame in a torch used to cut metal is produced by burning acetylene (C₂H₂) in pure oxygen. Assuming the combustion of 1 mole of acetylene releases 1251 kJ of heat, what mass of acetylene is needed to cut through a piece of steel if the process requires 55.2 × 10⁴ kJ of heat?

Answer 1