0.355 kg of water at 43.0°C is poured into a 0.300 kg beaker having a temperature of 25.0°C. A 0.500 kg block of aluminum at 37.0°C is placed in the water, and the system insulated. Calculate the final equilibrium temperature of the system.

A 50.0 g copper calorimeter contains 290 g of water at 20.0°C. How much steam must be condensed into the water if the final temperature of the system is to reach 40.0°C?

A cube of ice is taken from the freezer at -8.8°C and placed in a 104 g iron cup filled with 279 g of water. Both the water & the cup are at 23.9°C. Eventually the system reaches thermal equilibrium at 12.4°C. Determine Qcup, Qwater (for the water initially in the cup), Qice, & the mass of the ice.Qcup = Qwater = Qice = mice =

A silver block, initially at 56.9 ∘C∘C, is submerged into 100.0 gg of water at 24.1 ∘C∘C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 27.4 ∘C∘C.     What is the mass of the silver block? Express your answer to two significant figures and include the appropriate units.

What mass of water at 20.0°C must be allowed to come to thermal equilibrium with a 1.95-kg cube of aluminum initially at 150°C to lower the temperature of the aluminum to 60.0°C? Assume any water turned to steam subsequently recondenses. kg

A 1.50-kg iron horseshoe initially at 650°C is dropped into a bucket containing 13.0 kg of water at 22.0°C. What is the final temperature of the water-horseshoe system? Ignore the heat capacity of the container and assume a negligible amount of water boils away. °C

What mass of water at 20.0°C must be allowed to come to thermal equilibrium with a 1.90-kg cube of aluminum initially at 150°C to lower the temperature of the aluminum to 70.0°C? Assume any water turned to steam subsequently recondenses. kg

Warm air flows through a rectangular, uninsulated heating duct in your cold attic during the winter. The air has a mass flow rate of 0.47 kg/sec, and the heating duct has dimensions of 20.0cm by 28.0cm with a length of L = 9.60m. The inlet temperature of the air is 42.0°C, at a pressure of 1.00 atm. Your cold attic keeps the surface temperature of the duct at a temperature of 8.0°C. Find the heat transfer rate.