题目内容：

一道 英文的
a person bring a (70℃) hot chocolate with a metal spoon to (20℃） room.
a) what happen to hot chocolate,spoon,and air?
b) Identify and describe the primary method od head energy transfer (conduction,convection,or radiation) between each of the following
the hot chocolate and the spoon
the hot chocolate and the air in the entire room.
c) what point will the net transfer of heat energy stop?