Question

When two moles of Hydrogen atoms join together to form a mole of hydrogen molecules in a close
rigid vessel with diathermic walls. anduching,
ne-he
H(g) + H (9) - H2 (9)
(A) <
(B) AU = negative (C) qsystem = positive, (D) surrounding = negative​

Answer 1

Answer:

Explanation:

A MOLE of a substance contains a fixed number of atoms or molecules. That number is called Avogadro number and is equal to 6.02 x 1023 (i.e. 6.02 time 10 to the exponent 23). One MOLE of hydrogen atoms contains the same number of atoms as the number of hydrogen molecules in one MOLE of hydrogen molecules, i.e., Avogadro number. However, one mole of hydrogen atoms has a mass of 1 gram while one MOLE of hydrogen molecules has a mass of 2 grams.

H 2 has 2 atoms. So, a mole of H 2 should have 1 mole of H 2 molecules, and when broken down into atoms, 2 moles of atoms.

Reminder: Atoms are very small

H(g)+H(g)→H2 (g).

So, from the above reaction w<0.