Calculate the ΔG for the following system. Then state if the system is spontaneous or not spontaneous. ΔH = 147 kJ ΔS = -67.0 J/K T = 149 °

2.8 x 10^4 kJ; not spontaneous
157 kJ; not spontaneous
175 kJ; not spontaneous
2.8 x 10^4 kJ; spontaneous
157 kJ; spontaneous
175 kJ; spontaneous
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If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.

Fred is studying a substance that is made out of only one element. this means that