Internal energy change (note: you will need appendix a6 for this problem). a. how much energy in joules) must be added to 90 gallons of water at 25 °c and 1 atmosphere (1.0133 bar) to raise its temperature to 94°c? b. how much energy should be added to 90 gallons of 25 °c water at 0.51 bar to raise its temperature to 94°c? c. how much energy should be added to 90 gallons of 25°c water at 21.83 bar to raise its temperature to 94°c? d. how much energy should be added to the same mass of water at 25 °c and 0.0099 bar to raise its temperature to 94 °c? note: you'll need density values. these can be found in the steam tables (appendix a.6) under the column specific volume (m/kg). v is the specific volume of liquid water, v, for water vapor. the value of vis multiplied by 10%, meaning that the specific volume of water at 273.15 k is 1.000 * 10 mº/kg. density is the inverse of specific volume.