A. (R/ΔH) (1/T1 - 1/T2)
B. (ΔH/R) (1/T1 - 1/T2)
C. (ΔH/R) (1/T2 - 1/T1)
D. (1/R) (1/T1 - 1/T2)
Please do not use chat terms. Example: avoid using "grt" instead of "great".