Suppose we are putting in energy to dissociate a bubble of 1 mol of H molecules at STP (P = 105 Pa and T 300 K). We'll consider the bubble as our system and assume the pressure and temperature remain at STP. b. How many moles of H atoms are in the bubble after we have dissociated all the hydrogen molecules? c. What are the initial and final volumes of the bubble? Has the bubble expanded or contracted? d. Does the thermal energy of the system increase, decrease, or stay the same in this process? Explain your reasoning. If the thermal energy changes, calculate AEth.