Question

Hey answer it urgently u hv to answer ques1 and the or part both. Give reason for ur answer also and plzz only answer when u know the full answer fastly

Answer 1

Answer:

Explanation:when a substance undergoes a first order phase change it's temperature remains constant as long as the phase change remains incomplete. When ice at -10degrees is heated it's temperature rises until it reaches 0degrees C.At that temperature it starts melting.