<h3>
Answer:</h3>
1270 Psi
<h3>
Explanation:</h3>
<u>We are given;</u>
- Pressure in the tank, P₁ as 422 psi
- Temperature in the tank, T₁ as 20.0 K
- New temperature in the tank, T₂ as 60.0 K
We are required to determine the pressure at 60.0 K
- We are going to use the pressure law;
- According to the pressure law, the pressure of a gas is directly proportional to the temperature at constant volume.
- That is;
- Thus,
- At different pressures and temperature;
- Thus, rearranging the formula;
Hence;
Therefore;
P₂=1266 Psi
= 1270 Psi
Thus, the pressure at 60.0 K is 1270 Psi
Answer:
a. c= silver/ 234J(kg/K) > b. c= water/ 4190 J(kg/K) > c. c= glass/ 754J/(kg.K)
Explanation:
Hello.
In this case, since the heat resulting from the temperature change for an specified amount of a substance is defined via:
Since the specific heat is related to amount of energy required to raise the temperature of 1 kg of a substance by 1 °C, we can infer that the higher the specific heat, the higher the required energy as they are in a directly proportional relationship. Moreover, since the specific heat and the change in temperature are in an inversely proportional relationship, we can infer that the higher the specific heat, the lower the temperature change, therefore, we can rank the substances follows:
a. c= silver/ 234J(kg/K) > b. c= water/ 4190 J(kg/K) > c. c= glass/ 754J/(kg.K)
It means that silver will produce the largest temperature change, next water and finally glass since silver has the smallest specific heat next water and finally glass.
Best regards.
4Fe(s) + 3O2(g) → 2Fe2O3(s) ....... ΔH = -1.7 x 10^3 kJ
<span>shows that 1700 kJ of heat is released when 4 moles of Fe react. </span>
<span>Molar mass of Fe = 56 g/mol </span>
<span>Molar mass of Fe2O3 = 160 g/mol. </span>
<span>(a) When 4 mol ( 4 x 56 = 224 g) iron reacted 1700 kJ are released, </span>
<span>when 9.0 g Fe reacted, the amount of energy will be </span>
<span>(9.0 x 1700) / (224) = 68.3 kJ </span>
<span>(b) According to the equation, 1700 kJ of energy released during the formation of 2 moles of Fe2O3 which is 2 x 160 = 320 g of rust. </span>
<span>120 kcal x (4.18 kJ / 1 kcal) = 501.6 kJ </span>
<span>When 1700 kJ released = 320 g rust </span>
<span>when 501.6 kJ released = (501.6 x 320) / 1700 = 94.4 g rust</span>
I believe the correct answer from the choices listed above is the second option. The statement that best describes the most concentrated solution would be that it <span>has the most solute for a given volume. Concentration is oftentimes expressed as amount of solute per unit of volume. Hope this answers the question.</span>