I'm really confused about how to do these two problems. Please help me.

What is the amount of heat (kJ) required if 64.0 kg of H2O is heated from 25°C to 85°C?

200.0 g Al (C = 0.900 J/g × °C) at 95°C is added to 85.4 g H2O at 25°C. What is the final temperature of the water (and the Al)?

Refer to your post using Kate. Same type problem. I'll be happy to check your work if you post it.