answer the following question?

Question

2H2(g) + O2(g) --> 2H2O(g) ΔH = −486.6kJ



Which of the following are true statements for the above chemical reaction ?



a) A phase change is involved


b) Two moles of hydrogen gas react with two moles of oxygen gas to
produce two moles of water vapor


c) Energy is absorbed by the system, the reaction species


d) If the reaction takes place at constant pressure, q = −483.6 kJ


e) ΔH for reacting four moles of hydrogen gas with two moles of
of oxygen gas is −977.2 kJ

Answer 1

D.

A is false as no phase change is involved.
B is false because only one mole of O2 is involved.
C is false because the reaction is exothermic.
E the ΔH for reacting four moles of hydrogen gas with two moles of
of oxygen gas is −973.2 kJ

Answer 2

B and D are true

A is not true as the states stay the same

C is not true as the reaction is exothermic

I am not sure about E but it does not sound right, the reason I cannot give

Answer 3

only d is correct..........


rest all crap..