calculate the heat required in joules to convert 18.0 grams of water ice at a temperature of -20 c to liquid water at the normal boiling point of water given specific heat of ice 2.09

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?