Study the heating curve shown. A graph titled heating curve of Substance It shows heat added in joules on the x-axis, and temperature in degrees celsius on the y-axis on a scale of 0 to 120. The graph has a diagonal line from 30 degrees up to 60 degrees. A horizontal line segment at 60 degrees. A diagonal line segment from 60 degrees up to 90 degrees. A horizontal line segment at 90 degrees and then another diagonal segment. Which statement is best supported by the information in the heating curve? At segment T-U, the substance changes from a liquid to a gas and does not change temperature. At segment T-U, the substance changes from a gas to a liquid and changes temperature. At segment Q-R, the substance releases heat and increases in temperature. At segment Q-R, the substance absorbs heat and decreases in temperature.