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1. |
Heat of formations of A, B, C, and D, are 3 J, 5 J, 4 J, and 8 J respectively, what is the heat of reaction 2A + 2B -> 2C + D? |
A. | t-5 J |
B. | t0 |
C. | t5 J |
D. | t8 J |
Answer» C. t5 J | |