. ∆fUᶱ of arrangement of CH4 (g) at certain temperature is – 393 kJ mol–1. The worth of ∆ fHᶱ is (I) zero (ii) ∆f Uᶱ (iv) equivalent to ∆f Uᶱ Vinay 3 years ago solution: Choice (ii) is the appropriate response.
