Ethanol which has a specific heat of 2.44 (J/gxC) the heat that is absorbed requires 45515 Joules of energy to increases from 25C to 78.8C how much ethanol was used in grams

Imagine that twenty i.u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?