Two chemicals at room temperature (about 23°c) were combined in a flask. at first, there were bubbles. then, white flakes appeared at the bottom of the flask. after five minutes, the temperature of the solution was 33°c. a portion of the solution was used to measure its density and boiling point, which were determined to be 4.5 g/l and 82°c, respectively.
did a physical or chemical change occur?

how do you know it is not the other kind of change? provide at least three points of evidence that support your claim.

Steam reforming of methane ( ch4) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the starting point for many important industrial chemical syntheses. an industrial chemist studying this reaction fills a 1.5 l flask with 3.5 atm of methane gas and 1.3 atm of water vapor at 43.0°c. he then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of carbon monoxide gas to be 1 .0 atm. calculate the pressure equilibrium constant for the steam reforming of methane at the final temperature of the mixture. round your answer to 2 significant digits.