7554
The values of the standard ( p ( 0 ) = 0 . 1 MPa ) molar enthalpies of formation in the gas phase at T = 298 . 15 K have been determined .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None