Answer:
The outside temperature is -45.8°C
Explanation:
When a gas keeps on constant its moles and its pressure, we can assume that volume will be increased or decreased as the T° (absolute T° in K).
V1 / T1 = V2 / T2
2.95L/298K = 2.25L / T2
(2.95L/298K ) . T2 = 2.25L
T2 = 2.25L . 298K / 2.95L
T2 = 227.2K
T°K - 273 = T°C
227.2K - 273 = -45.8°C
Answer:
K
Explanation:
The picture that demonstrates a state of matter without a fixed shape or fixed volume is picture K.
Gases are one of the three states of matter without a fixed shape and volume. They simply take up the shape of their containers and are free to move all about.
- Liquids and solids are known to have fixed shape and volume.
- Liquids are know for their ability to flow. Figure L
- Solids are rigid bodies. It is the figure J
Answer: The heat of combustion per mole for acetylene is 227.7 kJ/mol.
Explanation:
The combustion equation of acetylene is as follows.
Formula to calculate enthalpy of formation for a reaction is as follows.
![\Delta H^{o}_{rxn} = \sum \Delta H_{products} - \sum \Delta H_{reactants}\\\Delta H^{o}_{rxn} = [2\Delta H^{o}_{f}(CO_{2}) + \Delta H^{o}_{f} (H_{2}O)] - [\Delta H^{o}_{f}(C_{2}H_{2}) + \frac{5}{2} \Delta H^{o}_{f} O_{2}]\\-1299.5 = 2(-393.5) + (-285.8) - \Delta H^{o}_{f} (C_{2}H_{2})\\\Delta H^{o}_{f} (C_{2}H_{2}) = 227.7 kJ/mol](https://tex.z-dn.net/?f=%5CDelta%20H%5E%7Bo%7D_%7Brxn%7D%20%3D%20%5Csum%20%5CDelta%20H_%7Bproducts%7D%20-%20%5Csum%20%5CDelta%20H_%7Breactants%7D%5C%5C%5CDelta%20H%5E%7Bo%7D_%7Brxn%7D%20%3D%20%5B2%5CDelta%20H%5E%7Bo%7D_%7Bf%7D%28CO_%7B2%7D%29%20%2B%20%5CDelta%20H%5E%7Bo%7D_%7Bf%7D%20%28H_%7B2%7DO%29%5D%20-%20%5B%5CDelta%20H%5E%7Bo%7D_%7Bf%7D%28C_%7B2%7DH_%7B2%7D%29%20%2B%20%5Cfrac%7B5%7D%7B2%7D%20%5CDelta%20H%5E%7Bo%7D_%7Bf%7D%20O_%7B2%7D%5D%5C%5C-1299.5%20%3D%202%28-393.5%29%20%2B%20%28-285.8%29%20-%20%5CDelta%20H%5E%7Bo%7D_%7Bf%7D%20%28C_%7B2%7DH_%7B2%7D%29%5C%5C%5CDelta%20H%5E%7Bo%7D_%7Bf%7D%20%28C_%7B2%7DH_%7B2%7D%29%20%3D%20227.7%20kJ%2Fmol)
Thus, we can conclude that heat of combustion per mole for acetylene is 227.7 kJ/mol.
The net osmosis will occur in the direction of the NaCl solution. This is because the solute concentration on that side is greater than that of the glucose solution. Osmosis is the process by which liquids move through semi permeable membrane from the region of lower concentration to the region of higher concentration.
Thus the water is going to move from the glucose solution into the NaCl solution.<span />
It is a chemical <em>process</em> - an oxidation.
