Part A

Part B

Burn injury from water steam is worse than boiling water is mostly because The temperature of water steam is higher than boiling water O Phase change is involved. When steam becomes liquid water, it releases heat. The skin contact area of water steam is generally larger than boiling water O The skin contact time of water steam is generally longer than boiling water The specific heat of water is 4.18 kJ/kg C, which means o It takes 1 kJ of energy to raise the temperature of 1 kg of water by 4.18 degree C o It takes 1 kJ of energy to raise the temperature of 4.18 kg of water by 1 degree C O It takes 4180 J of energy to raise the temperature of 1 kg of water by 1 degree C O It's a constant, and it does not have any specific meaning