The decomposition of ethanol at some constant temperature (above 500°C), ?over a copper surface, C2H5OH(g) ?CH3CHO(g) + ?H2(g) was studied by monitoring the total pressure with time. The following data were obtained: t (s) Ptotal (torr) 0 104 97 124 141 133 239 153 385 183 443 195 What will be the total pressure at t = 472 ?s? 1 ?pts Tries 0/5 What is the rate constant (k)? (Include appropriate units.