Calculate the amount of energy needed to convert 10g of ice from -20 °C to liquid water at 60 °C ice specific heat= 2.09 J/g°C
water specific heat= 4.18 J/g°C
steam specific heat= 1.84 J/g°C
Hfus= 6.02 KJ/mol
Hvap= 40.7 KJ/mol

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.