Which one of the following would raise the temperature of 20 gm of water at 30oC most when added to the water (sp. heat of copper = 0.42 J / gm oC; sp. heat of water = 4.2 / oC)
100 gm copper at 35oC
80 gm water at 27oC
20 gm water at 40oC
3 gm water at 80oC
Tyndal effect
