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
m_a_m_a [10]
3 years ago
13

Change in enthalpy when 11.2 dm3 of helium at ntp is heated in a cylinder to 100 degrees celsius

Chemistry
1 answer:
REY [17]3 years ago
8 0

Answer:

Enthalpy change = 333.3 J

Explanation:

Given data:

Volume of helium = 11.2 dm³ or 11.2 L

Temperature = 100 °C (100+273= 373 K)

Enthalpy change = ?

Solution:

Normal temperature of room = 20°C (20+273 = 293 K)

one mole of gas occupy volume = 22.4 L

ΔT = final temperature - initial temperature

ΔT = 373K - 293K

ΔT = 80K

Number of moles of gas = 11.2 L/22.4 l

Number of moles of gas = 0.5 mol

Enthalpy change = nRΔT

Enthalpy change = 0.5 mol × 8.3j/mol.k ×80 K

Enthalpy change = 333.3 J

You might be interested in
What is the lowest temperature that a substance can reach?
kobusy [5.1K]
Absolute zero that means cooling - 0 degree
3 0
3 years ago
Un mol de amoniaco Tiene una masa molar de 17 g y ocupa un volumen de 22.4 l qué volumen ocupa el 50 g amoniaco en condiciones n
mr_godi [17]

Answer:

V  = 65.81 L

Explanation:

En este caso, debemos usar la expresión para los gases ideales, la cual es la siguiente:

PV = nRT  (1)

Donde:

P: Presion (atm)

V: Volumen (L)

n: moles

R: constante de gases (0.082 L atm / mol K)

T: Temperatura (K)

De ahí, despejando el volumen tenemos:

V = nRT / P   (2)

Sin embargo como estamos hablando de condiciones normales de temperatura y presión, significa que estamos trabajando a 0° C (o 273 K) y 1 atm de presión. Lo que debemos hacer primero, es calcular los moles que hay en 50 g de amoníaco, usando su masa molar de 17 g/mol:

n = 50 / 17 = 2.94 moles

Con estos moles, reemplazamos en la expresión (2) y calculamos el volumen:

V = 2.94 * 0.082 * 273 / 1

<h2>V = 65.81 L</h2>
4 0
3 years ago
What best describes why a liquid needs a container when a solid does not?
kvv77 [185]
Because if you have a liquid then you need a glass to keep it together and when it is a solid it is already together so you don't need to do anything
7 0
3 years ago
Read 2 more answers
3. Which is not true about natural<br> selection?
tatuchka [14]

Answer:

A:There must be diversity in the population.

Explanation:

Hopefully this helps!

5 0
3 years ago
When heat is applied to water a 10 degrees Celsius, what does the energy transform into?
LUCKY_DIMON [66]

Answer:

Gas

Explanation:

This is kind of like the process of evaporating

5 0
3 years ago
Other questions:
  • The ________ is what needs to be overcome in a reaction so that it can proceed to the products.
    7·1 answer
  • When a substance cools down, is it releasing or absorbing energy?
    12·1 answer
  • Suppose that this individual now decides to give one-eight percent of a percent (0.125%) of her new net worth (8.12 * 10^10 to c
    13·2 answers
  • Which of the following is a strong base?<br><br> A. NH3<br> B.HCO3<br> C. NaOH<br> D. HCOOH
    9·1 answer
  • Which fact was most likely discovered between the time of Mendeleev’s table and the time of Moseley’s table that helped Moseley
    13·1 answer
  • Thermal decomposition of 5.00 metric tons of limestone to lime and carbon dioxide requires 9.00 × 106 kJ of heat. Convert this e
    14·1 answer
  • Hey what's the value of pi till<br>5 digits after decimal​
    14·2 answers
  • How many grams of NH3 can be prepared from 77.3 grams of N2 and 24.2 grams of H2?
    5·1 answer
  • An automobile tire at 30°C has a pressure of 3.00 atm. Temperature decreases to -5°C. Assume that there is no volume change in t
    11·1 answer
  • Can bacteria reproduce
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!