Calculate AH for the reaction: C2H4 (g) + H2 (g) - CH. (g), from the following data.
a.
CzH. (g) + 3 O2 (g) →
-
2 CO2 (g) + 2 H2O (1)
AH = -1411. kJ
b.
C2H. (g) + 3% O2 (g)
- 2 CO2 (g) + 3 H20 (1)
AH = -1560. kJ
c.
H2 (g) + 12 02 (g)
H2O (1)
AH = -285.8 kJ

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

there are two significant figures.