Thermochemistry Review

A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C. Calculate the specific heat capacity of iron. Show all work and proper units.

How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/g°C? Show all work and proper units.

To what temperature will a 50.0-g piece of glass raise if it absorbs 5275 joules of heat and its specific heat capacity is 0.50 J/g°C? The initial temperature of the glass is 20.0°C.

Calculate the heat capacity of a piece of wood if 1500.0 g of the wood absorbs 6.75×10^4 joules of heat, and its temperature changes from $$32^{\circ}C$$ to $$57^{\circ}C$$ . Show all work and proper units.

100.0 mL of 4.0°C water is heated until its temperature is 37°C. If the specific heat of water is 4.18 J/g°C, calculate the amount of heat energy needed to cause this rise in temperature.

6. 25.0 g of mercury is heated from 25°C to 155°C, and absorbs 455 joules of heat in the process. Calculate the specific heat capacity of mercury.

What is the specific heat capacity of silver metal if 55.00 g of the metal absorbs 47.3 calories of heat and the temperature rises from 50°C to 75°C?

If a sample of chloroform is initially at 25°C, what is its final temperature if 150.0 g of chloroform absorbs 1.0 kilojoules of heat, and the specific heat of chloroform is 0.96 J/g°C?

How many joules of heat are given off when 5.0 g of water cool from 75ºC to 25ºC (specific heat of water = 4.184 J/g·ºC)? Would this be an endothermic or exothermic reaction?

How many joules of energy are absorbed by 100 g of water heated from 20 ºC to 40 ºC? (specific heat of water = 4.184 J/g·ºC)? Would this be an endothermic or exothermic reaction?