All categories

3 years ago

3h2(g)+o3(g) 3h20(g) arrow after the o3(g)whats the overall enthalpy?

Chemistry

1 answer:

Dmitry_Shevchenko [17]3 years ago

8 0

The overall enthalpy of reaction will be calculated from enthalpy of formation of products and reactants.

DeltaHrxn = [Sum of enthalpy of formation of products] - [sum of enthalpy of formation of reactants]

DeltaHrxn = 3 X deltaHf (H2O) - [ 3 X DeltaH (H2) + DeltaH (O3)]

DeltaHrxn = 3 X (--242) - [ 0 + 143] = -869 kJ / mole

We can also calculate the enthalpy of reaction from bond energies

You might be interested in

You have come down with a nasty cold and would like to understand why the virus that infected you is making you feel so lousy. W

umka21 [38]

Answer:

a) The volume is 5.236x10⁻¹³L

b) The molarity of a single virus is 1.91x10¹² mol/L

c) The molarity for a 100 virus particles is 1.91x10¹⁴ mol/L

Explanation:

a) Given:

D = diameter of the cell = 10 μm

r = radius = 10/2 = 5 μm

The volume of the spherical cell is equal:

$V=\frac{4}{3} \pi r^{3} =\frac{4}{3} \pi *(5)^{3} =523.6\mu m^{3}$

If 1 μm³ = 1x10⁻¹⁵L, then 523.6 μm³ = 5.236x10⁻¹³L

b) The molarity is:

$M=\frac{number-of-moles}{volume-of-solution}$

For a single virus within the cell

$M=\frac{1}{5.236x10^{-13} } =1.91x10^{12} mol/L$

c) For a 100 virus particles the molarity is:

$M=\frac{100}{5.236x10^{-13} } =1.91x10^{14} mol/L$

4 0

3 years ago

Coal and diamond are both minerals .they are both expensive.why

Liula [17]

Answer:

hard to find

Explanation:

4 0

3 years ago

Read 2 more answers

One of the most important aspects of a periodic table is that it _________________.

garri49 [273]

B) brings order to the elements. This is correct because elements are in order by highest atomic number.

5 0

3 years ago

Does anyone know the answer to these? Please help.

Phantasy [73]

double replacesment and 1,14,12,6

5 0

3 years ago

If you want to melt ice into liquid water, does the ice absorbs heat or release heat? Is this endothermic or exothermic?

kherson [118]

Answer:

Endothermic

Explanation:

This would be an endothermic reaction, due to the fact that the water would be signifigantly warmer then the ice cube, which causes it to melt.

3 0

2 years ago

Read 2 more answers