Chemistry- URGENT please HELP
posted by Bri
NH4NO3(s)+H2O(l)→NH4NO3(aq) ΔH = +25.7 kJ.
What is the final temperature in a squeezed cold pack that contains 49.0g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18J/(g⋅∘C) for the solution, an initial temperature of 28.5∘C, and no heat transfer between the cold pack and the environment.
Please help. I keep getting an increase in heat, which I know isn't right. But I can't seem to figure out where I went wrong. Please explain! Thanks!