Energy Resources: Indicate which statements are true and which are false Most of the petroleum maturation process occurs in the temperature range of 150° to 200°C. False Change in character of coal with increasing application of heat and pressure. There is a general trend toward higher carbon content and higher heat value with increasing grade, especially heat value increases as coal tends toward graphite. True

Energy Resources: Indicate which statements are true and which are false Most of the petroleum maturation process occurs in the temperature range of 150° to 200°C. False Change in character of coal with increasing application of heat and pressure. There is a general trend toward higher carbon content and higher heat value with increasing grade, especially heat value increases as coal tends toward graphite. True