Thermochemistry KC #2 2023

The specific heat of aluminum is 0.21 J/g°C.  How much heat is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50° C?

how much heat energy (q) moves from 20 g of water when its temperature changes from 25° C to 20° C? The specific heat of water is 4.18 J/g°C.  

What is the specific heat of an unknown substance if 100.0 g of it at 200.0 °C reaches an equilibrium temperature of 27.1 °C when it comes in contact with a calorimeter of water.  The water weighs 75 g and had an initial temperature of 20.00 °C.  (Specific heat of water is 4.18 J/g°C)

8260 J of heat energy is added to change the temperature of water by 10 °C. How many grams of water are being heated? The specific heat of water = 4.18 J/g*C

What heat energy is required to raise the temperature of a 12 g sample of mercury from 25 °C to 33 °C? (specific heat of mercury =.16 j/g*C)

A 95 gram volume of water has an initial temperature of 30 ^oC. A piece of metal with a mass of 120 grams and an initial temperature of 98 ^oC is placed in the water. The final temperature of the water and the metal is 35 ^oC. The specific heat of water is 4.18 J/gC. What is the specific heat of the metal?

478 J will heat a sample of an unknown compound from 15 to 27 degrees Celsius. If the compound has a specific heat of 0.88 J/g*C, what is the mass of the sample?

A 15.75g piece of a metal absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C.  Calculate the specific heat.