Oxygen gas reacts with hydrogen gas according to the following reaction O2(g) + 2H2(g) - 2H20 (1) If the enthalpy of formation for oxygen gas and hydogen gas are both 0 kJ/mol and the enthalpy of formation for water is -286 kJ/mol. What is the enthalpy of the reaction?
ΔΗrxη = ΣηΔΗ(products) - ΣηΔΗ(reactants)

a. 0 kJ

B. not enough information to determine.

C. - 286 kJ

D. -572 kJ

In any energy conversion, some of the energy is lost to the environment as question 5 options: electrical energy potential energy sound energy thermal energy

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.