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
Romashka-Z-Leto [24]
3 years ago
5

Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 1.30 MJ o

f energy in the form of heat if the temperature of the sodium is not to increase by more than 10.0 °C? Use C P = 30.8 J / ( K ⋅ mol ) for Na ( l ) at 500 K

Chemistry
2 answers:
Sunny_sXe [5.5K]3 years ago
7 0

Answer:

97 000 g Na

Explanation:

The absortion (or liberation) of energy in form of heat is expressed by:

q=m*Cp*ΔT

The information we have:

q=1.30MJ= 1.30*10^6 J

ΔT = 10.0°C = 10.0 K (ΔT is the same in °C than in K)

Cp=30.8 J/(K mol Na)

If you notice, the Cp in the question is in relation with mol of Na. Before using the q equation, we can find the Cp in relation to the grams of Na.

To do so, we use the molar mass of Na= 22.99g/mol

Cp= \frac{30.8J}{K*mol Na}*\frac{1 mol Na}{22.99 g Na}=1.34\frac{J}{K*g Na}

Now, we are able to solve for m:

m=\frac{1.30*10^6 J}{1.34\frac{J}{K*g Na} *10.0K}=\frac{1.30*10^6J}{13.4\frac{J}{g Na} }  = 9.70*10^4 g Na=97 Kg Na=97 000 g Na

V125BC [204]3 years ago
4 0

Explanation:

Below is an attachment containing the solution.

You might be interested in
What is the molality (m) of a solution that contains 76.5 g of KCl dissolved in 85.0 g of<br> water?
ladessa [460]

Answer:

76.5g KCl/74.55 grams per mole Kcl = x

molality= x/.085 kg H2O

Explanation:

well remember molality is moles of solute/kilograms of solvent. So it's the moles of KCl over 85 g of h20 converted into kg. if this makes sense.

5 0
3 years ago
How many meters in 1000 mm
iris [78.8K]
1000 mm equals 1 meter
7 0
3 years ago
Read 2 more answers
Helppppppppppp!!!!!!!!
Natali5045456 [20]

Pressure does not affect the voltage produced in a voltaic cell.

8 0
3 years ago
Which of the following statements are not scientific hypotheses?
ss7ja [257]

Answer:

.

Explanation:

8 0
3 years ago
Read 2 more answers
What is the definition of lead in chemistry
abruzzese [7]

Answer:

Lead is a chemical element with the symbol Pb (from the Latin plumbum) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point.

Explanation:

6 0
3 years ago
Other questions:
  • Is salt a compound or mixture?
    8·2 answers
  • Suppose that 25.0 mL of 0.10 M CH3COOH (aq) is titrated with 0.10 M NaOH (aq). What is the pH after the addition of 10.0 mL of 0
    10·1 answer
  • Given: 8CO + 17H2 → C8H18 + 8H2O In this chemical reaction, how many grams of H2 will react completely with 6.50 moles of CO? Ex
    11·2 answers
  • How many miles of C atoms are present in a sample of 3.85x1024 C atoms?
    6·1 answer
  • Calculate [H3O+] and [OH−] for each of the following solutions at 25 ∘C given the pH. pH= 8.74, pH= 11.38, pH= 2.81
    9·1 answer
  • How do you set up number 8
    6·1 answer
  • Convert 2.83 days into seconds
    15·1 answer
  • How many atoms are in 2.70 moles of iron (Fe) atoms?
    8·1 answer
  • If 11.9 kJ are used to heat a sample of water the temperature increases from 20.0°C to
    10·1 answer
  • The number of gas molecules in a container is doubled. How will the pressure in the container change if the temperature and volu
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!