(II) When a 290-g piece of iron at 180°C is placed in a 95-g aluminum calorimeter cup containing 250 g of glycerin at 10°C, the final temperature is observed to be 38°C. Estimate the specific heat of glycerin

(I) How much heat (in joules) is required to raise thetemperature of 34.0 kg of water from 15°C to 95°C?

(c) If melting ice of mass 80 g is added to 400 g of water at 20 °C, what will be the final temperature of the water, assuming that no energy is lost to the surroundings? The specific heat capacity of water is 4200 J kg °C'. The specific latent heat of fusion of ice is 3.34 × 10° J kg'.

(II) Typical temperatures in the interior of the Earth and Sun are about 4000°C and 15 x 106 °C, respectively. (a) What are these temperatures in kelvins? (b) What percent error is made in each case if a person forgets to change °C to K?

(g) A 2 kW kettle containing 1.5 kg of water at 15°C is switched on for 5 minutes. i. How much heat energy is transferred? ii. What will be the temperature rise of the water? (Cwater = 4.2k] kg-1 K-') iii. What is the final temperature of the water?

(iv) Convert 129 J/kg°C to cal/g°c (a) 5.3x105 (b) 0.031 (c) 32.44 (d) 30.8

Occasionally, huge icebergs are found floating on the ocean’s currents. Suppose one such iceberg has a regular volume and is 120 km long, 35 km wide, and 230 m thick. (i)    How much heat would be required to melt this iceberg (assumed to be at 0°C) into liquid water at 0°C? (The density of ice is 917 kg/m3. The latent heat of fusion for ice is 33.5 x 104 J/kg.) (ii)   Assume the average annual energy consumption by a developed country in the past years was 9.3 x 1019 J. If this energy were delivered to the iceberg every year, how many years would it take before the ice is completely melted? (iii)  What will be the outcome(s) and possible implication(s) in (ii) if the time rate of the changes in average annual energy consumption is a positive number?

(II) What will be the equilibrium temperature when a 265-gblock of copper at 245°C is placed in a 145-g aluminumcalorimeter cup containing 825 g of water at 12.0°C?

(II) A water heater can generate 32000 KJ/h. How much water can it heat from 12°C to 42°C per hour?