Aheat recovery system (hrs) is used to conserve heat from the surroundings and supply it to the mars rover. the hrs fluid loops use freon as the working fluid. the instrumentation must be kept as a temperature greater than negative 67−67 degrees fahrenheit [°f] to avoid damage. the temperature in the area of mars where the rover is exploring is 189189 kelvins [k]. if the system must remove 47.447.4 british thermal units [btu] of energy, what volume of freon is needed in units of liters [l]?