The standard enthalpy change for the following reaction is -425 kJ at 298 K. K(s) + 1/2O₂(g) + 1/2 H₂(g) →→→ KOH(s) ΔΗ AH° = -425 kJ What is the standard enthalpy change for the reaction at 298 K? 2 K(s) + O₂(g) + H₂(g) – 2 KOH(s) kj Submit Answer Retry Entire Group 9 more group attempts remaining

Given the following decomposition reaction2H2O2 (l)---> 2H2O(l) + O2 (g) ΔH = –196.1 kJ A. How much heat is released when 1332 kg of H2O2 decomposes?

Determine the heat involved in the combustion of liquid hydrazine by using the following reactions. 2NH3(g) + 3N2O(g) → 4N2(g) + 3H2O(ℓ)      ΔH°= –1013 kJ/molN2O(g) + 3H2(g) → N2H4(ℓ) + H2O(ℓ)      ΔH°= –317 kJ/mol2NH3(g) + ½O2(g) → N2H4(ℓ) + H2O(ℓ)      ΔH°= –142.9 kJ/molH2(g) + ½ O2(g) → H2O(ℓ)       ΔH°= –285.8 kJ/mol Then, Launching a small spacecraft to study Jupiter required approximately 28 million kJ. Assume that hydrazine was the only fuel. What mass of hydrazine, in kilograms, was needed for the launch?