Review Thermo Test

2. If the specific heat of water is 4.18 J/g∙°C, how much heat is required to increase the temperature of 1,200g of water from 23 °C to 39 °C?

• -80,256 J

• 80,256 J

• 80.256 J

• -80.256 J

A 100.-gram sample of at 22.0°C absorbs

8360 joules of heat. What will be the final

temperature of the water?

• 18.3°C

• 20.0°C

• 25.7°C

• 42.0°C

• –814 kJ

• 814 kJ

• –372 kJ

• 372 kJ

A hot iron ball is dropped into a 200. g sample of water initially at 50.^oC. If 8400 J of heat is transferred from the ball to the water, what is the final temperature of the water? (Use this for the specific heat of water is 4.2 J/g^oC)

• 40. ^oC

• 51 ^oC

• 60. ^oC

• 70. ^oC

What is the specific heat of a 230 g metal that takes 3100 cal to heat from 25 °C to 83 °C

• 0.0023 cal /g *C

• 0.23 cal /g *C

• 3400 cal /g *C

• 3.4 cal / g*C