What is the ∆G for the following reaction under nonstandard conditions where the following data is given? 2NH4Cl(s) + CaO(s) CaCl2(s)+ H2O + 2NH3(g)

Given:
CaO: ∆Hf = -635.09 kJ, ∆Sf =39.75 J/K
CaCl2: ∆Hf = -795.8 kJ, ∆Sf =104.6 J/K.
NH3: ∆Hf = -46.11 kJ, ∆Sf = 192.45,
H2O: ∆Hf = -285.830 kJ, ∆Sf = 69.91 ,
NH4Cl: ∆Hf = -314.43 kJ, ∆Sf = 94.6
A.
2.27 J
B.
-4.54 J
C.
4.54 J
D.
9.08 J
E.
-9.08 J

Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

How are evaporation and sublimation similar? a both involve the formation of a gas. b both release energy to the surroundings. c both take place throughout a solid. d both take place at the surface of a liquid.

Avolleyball player hit a ball with a mass of 0.25 kg. the average acceleration of the ball is 15.5 m/s². how much force did the volleyball player apply to the ball? 62.0 n 3.87 n 62.0 m/s² 3.87 m/s²