How much heat energy is required to boil 55.2 g of ammonia, NH3? The molar heat of vaporization of ammonia is 23.4 kJ/mol. 9 = kl

How much heat is liberated at constant pressure when 1.41 g of potassium metal reacts with 6.52 mL of liquid iodine monochloride ( d = 3.24 g/mL)? 2K(s) + ICl(l) → KCl(s) + KI(s) ΔH° = –740.71 kJ/mol a. 1.23 × 10^2 kJ b. 7.41 × 10^2 kJ c. 2.22 × 10^3 kJ d. 9.64 × 10^1 kJ e. 1.34 × 10^1 kJ

If the heat of combustion for a mole of methane (CH) is -2,200 kJ, how  many grams of methane must be burned to heat 455 g of ice at 0°C to water at 88°C?

7. An old "trick" for cooling down a hot beverage quickly is to immerse a cold spoon into the liquid. A silver spoon weighing 3.20 oz and at a temperature of 20°C is placed in a cup of hot coffee (8.00 oz) at 70°C. What will be the resulting liquid temperature? Assume that specific heat of coffee is 4.18 J g-1 °C-1 and that of silver is 0.234 J g-¹ °C-1. Comment on the effectiveness of this method of cooling a hot drink. 1 g = 0.0352 oz