1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Liono4ka [1.6K]
3 years ago
14

Calculate the amount of energy in Joules required to change 10 g of solid mercury at its melting point to mercury vapor at the b

oiling point. The m_p, b_p, and specific heat of mercury are -39^degree C, - 375^degree C, and 0.140 J/g^degree C, respectively. Compare with the amount of heat needed to change 10 g of ice at 0^degree C to steam at 100^degree C.
Chemistry
1 answer:
Mazyrski [523]3 years ago
4 0

Q: Calculate the amount of energy in Joules required to change 10 g of solid mercury at its melting point to mercury vapor at the boiling point. The m_p, b_p, and specific heat of mercury are -39^degree C,  375^degree C, and 0.140 J/g^degree C, respectively. Compare with the amount of heat needed to change 10 g of ice at 0^degree C to steam at 100^degree C.

Answer:

The heat required = 575.4 J

Q₂ > Q₁ (The amount of energy required by the mercury is small than the amount of energy required by the water.)

Explanation:

Q₁ = c₁m₁(T₂-T₁)....................... Equation 1

Where Q₁ = amount of heat or Energy. c₁ = specific heat capacity of mercury, m₁ = mass of mercury, T₂ = Temperature of mercury at boiling point, T₁ = Temperature of mercury at melting point.

<em>Given: m₁ = 10 g , c₁ = 0.14 J/g.°C, T₂ = 372 °C, T₁ = -39 °C</em>

<em>Substituting these values into equation 1</em>

<em>Q₁ = 10×0.14 (372+39)</em>

<em>Q₁ = 1.4(411)</em>

Q₁ = 575.4 J.

Thus the heat required = 575.4 J

Q₂ = c₂m₂(θ₂-θ₁)....................... Equation 2

Where Q₂ = heat required to change the temperature of water from 0 °C to 100 °C, c₂ = specific heat capacity of water, m₂ = mass of water, θ₂ = Final temperature of water, θ₁ = Initial Temperature of water.

<em>Given: m₁ = 10 g, </em>θ₂ = 100 °C, θ₁ = 0 °C

Constant: c₂ = 4.2 J/g.°C

Substituting these values into equation 2

Q₂ = 10(4.2)(100-0)

Q₂ = 4200 J.

Comparing Q₁ and Q₂,

Q₂ > Q₁

Hence the amount of energy required by the mercury is small than the amount of energy required by the water.

<em></em>

You might be interested in
Which kind of nuclear decay does not alter the identity of the atom?
alukav5142 [94]
Hmmmmmm, Gamma Radiation 
4 0
3 years ago
Read 2 more answers
Is the following chemical equation balanced?<br> C₁₀H₂₂ + 31 O₂ ⟶ 20 CO₂ + 22 H₂O
Reil [10]

Answer:

Yes- i balanced it-

Explanation:

3 0
3 years ago
Water flows from the bottom of a large tank where the pressure is 100 psig through a pipe to a turbine which produces 5.82 hp. T
Marianna [84]

Explanation:

Bernoulli equation for the flow between bottom of the tank and pipe exit point is as follows.

   \frac{p_{1}}{\gamma} + \frac{V^{2}_{1}}{2g} + z_{1} = \frac{p_{2}}{\gamma} + \frac{V^{2}_{2}}{2g} + z_{2} + h_{f} + h_{t}

    \frac{(100 \times 144)}{62.43} + 0 + h[tex] = [tex]\frac{(50 \times 144)}{(62.43)} + \frac{(70)^{2}}{2(32.2)} + 0 + 40 + 60

                          h = \frac{(50 \times 144)}{(62.43)} + \frac{(70)^{2}}{2(32.2)} + 40 + 60 - \frac{(100 \times 144)}{(62.43)}

                            = 60.76 ft

Hence, formula to calculate theoretical power produced by the turbine is as follows.

                                 P = mgh

                                     = 100 \times 60.76

                                     = 6076 lb.ft/s

                                     = 11.047 hp

Efficiency of the turbine will be as follows.

                \eta_{t} = \frac{P_{actual}}{P_{theoretical}} × 100%

                                = \frac{5.82}{11.047} \times 100%                      

                                = 52.684%

Thus, we can conclude that the efficiency of the turbine is 52.684%.

4 0
3 years ago
All airplanes have mass; therefore, what force pulls them toward the ground?
Marina86 [1]

Answer:

B. Gravity

Explanation:

Gravity pulls stuff down

7 0
2 years ago
What is frost action
attashe74 [19]
The weathering process caused by cycles of freezing and thawing of water in surface pores, cracks, and other openings



7 0
3 years ago
Read 2 more answers
Other questions:
  • What part of an atom bonds with other atoms
    13·2 answers
  • Which natural methods remove CO2 from the atmosphere?
    7·2 answers
  • Which letter indicates a subatomic particle with a mass of 5.489 x 10-4 amu
    5·2 answers
  • What is the source of electrons for the reaction center of photosystem ii in photosynthesis?
    13·1 answer
  • Consider the gas-phase equilibrium A ? B. In a series of experiments, different initial amounts of A and B are mixed together, a
    9·1 answer
  • The half-life of 3H (H-3) is 12 years. About how long does it take for 127/128 of a sample of that radionuclide to decay? (Hint:
    5·1 answer
  • What mass of magnesium hydroxide is required to create a 441 mL solution with a pH of 12.52?
    15·1 answer
  • A chemical reaction is shown.
    5·1 answer
  • Which of theCardiorespiratory fitness is most likely to improve due to which of the following types of exercise? A. bicycling B.
    11·1 answer
  • 4. How can you calculate the solubility of a gas in a liquid under different<br> pressures
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!