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2 years ago

For the reaction PCl5(g) + heat PCl3(g) + Cl2(g), what will happen when the temperature is decreased

Chemistry

2 answers:

vovikov84 [41]2 years ago

5 0

There will be a shift towards the reactants

Rus_ich [418]2 years ago

4 0

Answer:

As temperature is decreased the reaction will shift towards the reactants i.e. it will favour the formation of PCl5

Explanation:

According to Le Chatelier's principle, when a reaction at equilibrium is subject to a change in temperature, pressure, concentration etc then the equilibrium will shift in a direction so as to undo the effect of the induced change.

The given reaction is:

PCl5(g) + heat ↔ PCl3(g) + Cl2(g)

This reaction is endothermic i.e. heat is absorbed by the reactants. When the temperature is decreased, this would imply that heat is being removed from the system. Therefore, as per Le Chatelier's principle the equilibrium will shift in a direction that would favor more input of heat i.e. it will shift towards the reactants.

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A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 8.10kg of water at 33.9 degree

lions [1.4K]

Answer:

The new temperature of the water bath 32.0°C.

Explanation:

Mass of water in water bath ,m= 8.10 kg = 8100 g ( 1kg = 1000g)

Initial temperature of the water = $T_1=33.9^oC=33.9+273K=306.9 K$

Final temperature of the water = $T_2$

Specific heat capacity of water under these conditions = c = 4.18 J/gK

Amount of energy lost by water = -Q = -69.0 kJ = -69.0 × 1000 J

( 1kJ=1000 J)

$Q=m\times c\times \Delta T=m\times c\times (T_2-T_1)$

$-69.0\times 1000 J=8100 g\times 4.18 J/g K\times (T_2-306.9 K)$

$-69,000.0 J=8100 g\times 4.18 J/g K\times (T_2-306.9 K)$

$T_2=304.86 K=304.86 -273^oC=31.86^oC\approx 32.0^oC$

The new temperature of the water bath 32.0°C.

5 0

3 years ago

or a particular isomer of C 8 H 18 , the combustion reaction produces 5104.1 kJ of heat per mole of C 8 H 18 ( g ) consumed, und

beks73 [17]

Answer:

The standard enthalpy of formation of this isomer of $C_{8}H_{18}$ is -220.1 kJ/mol.

Explanation:

The given chemical reaction is as follows.

$C_{8}H_{18}(g)+ \frac{25}{2}O_{2}(g) \rightarrow 8CO_{2}(g)+9H_{2}O(g)$

$\Delta H^{o}_{rxn}= -5104.1kJ/mol$

The expression for the entropy change for the reaction is as follows.

$\Delta H^{o}_{rxn}=[8\Delta H^{o}_{f}(CO_{2}) +9\Delta H^{o}_{f}(H_{2}O)]-[\Delta H^{o}_{f}(C_{8}H_{18})+ \frac{25}{2}\Delta H^{o}_{f}(O_{2})]$

$\Delta H^{o}_{f}(H_{2}O)= -241.8kJ/mol$

$\Delta H^{o}_{f}(CO_{2})= -393.5kJ/mol$

$\Delta H^{o}_{f}(O_{2})= 0kJ/mol$

Substitute the all values in the entropy change expression.

$-5104.1kJ/mol=[8(-393.5)+9(-241.8)kJ/mol]-[\Delta H^{o}_{f}(C_{8}H_{18})+ \frac{25}{2}(0)kJ/mol]$

$-5104.1kJ/mol=-5324.2kJ/mol -\Delta H^{o}_{f}(C_{8}H_{18})$

$\Delta H^{o}_{f}(C_{8}H_{18}) =-5324.2kJ/mol +5104.1kJ/mol$

$=-220.1kJ/mol$

Therefore, The standard enthalpy of formation of this isomer of $C_{8}H_{18}$ is -220.1 kJ/mol.

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

2 years ago

Read 2 more answers

Which combination of reactants would result in a neutralization reaction with sodium nitrate,

Debora [2.8K]

Answer:

(B) HNO3 + NaOH

Explanation:

Hello,

In this case, for the production of sodium nitrate a substance having the sodium as a cation should react with another substance having the nitrate anion. Moreover, neutralization reactions are carried out when bases react with acids, such is the case of nitric acid and sodium hydroxide:

$NaOH+HNO_3\rightarrow NaNO_3+H_2O$

Thus, the answer is (B) HNO3 + NaOH as the other options involve salts rather than acids or bases as starting reactants.

Regards.

7 0

2 years ago

Suppose a healthy individual experiences a surge in plasma calcium. subsequently, where would one expect to find the greatest am

victus00 [196]

One can expect to find the greatest amount of hydrolyzed pth when, entering the nephrons.

<h3><u>Where would one expect to find the greatest amount of hydrolyzed pth ?</u></h3>

In a healthy person, the body will respond by excreting calcium and PTH byproducts if plasma calcium is higher than usual. The nephron is a solid predictor since the kidneys are where excretion takes place.

A) is false since PTH, not the hydrolyzed compounds, is produced by the parathyroid gland.
One would anticipate significant amounts of PTH exiting the liver rather than entering since the liver hydrolyzes PTH.
The largest concentration would still be in the nephrons, even if it is possible that some hydrolysis products will be in systemic circulation (and therefore penetrate the bones).
The cortical bone, which is the outermost part of the bone, has a network of small tubes called haversian canals that let blood vessels and nerves to pass through them.

To view more about hydrolyzed pth, refer to:

brainly.com/question/4765096

#SPJ4

8 0

1 year ago