For a phase change, A H0 = 31 kJ/mol and A S0 = 0.093 kJ/(K•mol). What are A G and the spontaneity of the phase change at 300 K?
A. A G = 3.1 kJ; nonspontaneous
B. A G = 3.1 kJ; spontaneous
C. A G = 59 kJ; nonspontaneous
D. A G = 59 kJ; spontaneous

What can be found in the ionosphere

Which of the following has expanded our knowledge of the universe beyond our solar system the most? a. manned space travel b. the hubble space telescope c. the pioneer and voyager missions d. the international space station

Can anyone explain 1. review your spectrometry data and use the known elements to identify the star's composition. which unknown elements make up this star? justify your element selections. 2. in parts i and ii of the lab, what happened to the electrons of each element to produce the different colors of light? explain your answers using important terms from the lesson and information provided in the laboratory. 3. stars composed of heavier (more massive) elements are often slightly older than stars made predominantly from hydrogen and helium. based on your data, is the newly discovered star a younger star? explain your answer.