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Alexxx [7]
3 years ago
14

Q.7. Which of these substances is a compound?

Chemistry
1 answer:
djyliett [7]3 years ago
8 0
Is the liter to if meaning
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Which of the following molecules or ions has a bent shape?
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1. Propane gas (C3H8) burns completely in the presence of oxygen gas (O2) to yield carbon dioxide gas (CO2) and water vapor (H2O
vovikov84 [41]
1) Balanced equation

C3H8 + 5O2 -> 3 CO2 + 4 H2O

2) 0.700 L C3H8

Given the pressure and temperature do not change, the molar ratio is equivalent to volume ratio

1molC3H8 / 5 mol O2 => 1 L C3H8 / 5 L O2

0.700 L C3H8 / x L O2 = 1 L C3H8 / 5 L O2 => x = 0.700 L C3H8 * 5 L O2 / 1 L C3H8

x = 3.500 L O2

3) CO2 produced

1 L C3H8 / 3 L CO2 = 0.700 L C3H8 / x L CO2 =>

x = 0.700 L C3H8 * 3 L CO2 / 1 L C3H8 = 2.100 L CO2

4) Water vapor produced

1) 1 L C3H8 / 4 L H2O = 0.700 LC3H8 / x L H2O =>

x = 0.700 L C3H8 * 4 L H20 / 1 L C3H8 = 2.800 L H2O
3 0
3 years ago
At 25 °C, the equilibrium partial pressures for the following reaction were found to be PA = 8.00 atm, PB = 5.40 atm, PC = 6.90
Yuliya22 [10]

<u>Answer:</u> The standard change in Gibbs free energy for the given reaction is 4.33 kJ/mol

<u>Explanation:</u>

For the given chemical equation:

A(g)+2B(g)\rightleftharpoons C(g)+D(g)

The expression of K_p for the given reaction:

K_p=\frac{p_C\times p_D}{p_A\times (p_B)^2}

We are given:

p_A=8.00atm\\p_B=5.40atm\\p_C=6.90atm\\p_D=5.90atm

Putting values in above equation, we get:

K_p=\frac{6.90\times 5.90}{8.00\times (5.40)^2}\\\\K_p=0.174

To calculate the standard Gibbs free energy, we use the relation:

\Delta G^o=-RT\ln K_p

where,

\Delta G^o = standard Gibbs free energy

R = Gas constant = 8.314J/K mol

T = temperature = 25^oC=[25+273]K=298K

K_p = equilibrium constant in terms of partial pressure = 0.174

Putting values in above equation, we get:

\Delta G^o=-(8.314J/Kmol)\times 298K\times \ln (0.174)\\\\\Delta G^o=4332.5J/mol=4.33kJ/mol

Hence, the standard change in Gibbs free energy for the given reaction is 4.33 kJ/mol

3 0
3 years ago
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