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
butalik [34]
3 years ago
9

How much heat would be released by 1.3 kg of water if it's temperature went from 295 k to 274 k

Chemistry
1 answer:
kicyunya [14]3 years ago
4 0

Answer: The energy released will be 114.223 kJ.

Explanation:

To calculate the amount of heat released, we use the formula:

Q= m\times c\times \Delta T

Q = heat gained  or released

m = mass of the substance = 1.3kg = 1300 g   (Conversion factor: 1kg = 1000g)

c = heat capacity of water = 4.184 J/g K

\Delta T={\text{Change in temperature}}=(274-295)K=-21K

Putting values in above equation, we get:  

Q=1300g\times 4.184J/gK\times (-21)K

Q = -114223 Joules  = -114.223 kJ      (Conversion Factor: 1kJ = 1000J)

Negative sign implies heat released.

Hence, heat released by 1.3 kg of water is 114.223kJ.

You might be interested in
A _______ is formed when tectonic plates collide.
Ivanshal [37]
A convergent plate boundary is formed when tectonic plates collide
3 0
3 years ago
You have an unknown quantity of oxygen at a pressure of 2.2 atam, a volume of 21 liters and a temperature of 87 Celsius. How man
laila [671]

<span>Let's assume that the oxygen gas has ideal gas behavior. 
Then we can use ideal gas formula,
      PV = nRT</span>


Where, P is the pressure of the gas (Pa), V is the volume of the gas (m³), n is the number of moles of gas (mol), R is the universal gas constant ( 8.314 J mol⁻¹ K⁻¹) and T is temperature in Kelvin.

<span>
P = 2.2 atm = 222915 Pa
V = 21 L = 21 x 10</span>⁻³ m³

n = ?

R = 8.314 J mol⁻¹ K⁻¹

<span> T = 87 °C = 360 K

By substitution,
</span>222915 Pa x 21 x 10⁻³ m³ = n x 8.314 J mol⁻¹ K⁻<span>¹ x 360 K
                                       n = 1.56</span><span> mol</span>

<span>
Hence, 1.56 moles of the oxygen gas are </span><span>left for you to breath.</span><span>
</span>
6 0
3 years ago
How many atoms are there in 5.00 mol of sulphur (S)?
Mumz [18]

Answer:

3.01 × 10²⁴ atoms S

General Formulas and Concepts:

<u>Chemistry - Atomic Structure</u>

  • Using Dimensional Analysis
  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Explanation:

<u>Step 1: Define</u>

5.00 mol S

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

<u />5.00 \ mol \ S(\frac{6.022 \cdot 10^{23} \ atoms \ S}{1 \ mol \ S} ) = 3.011 × 10²⁴ atoms S

<u />

<u>Step 4: Check</u>

<em>We are given 3 sig figs. Follow sig fig rules and round.</em>

3.011 × 10²⁴ atoms S ≈ 3.01 × 10²⁴ atoms S

6 0
3 years ago
A shampoo has a pH of 8.59. What is the [H3O+] in the shampoo?
Cerrena [4.2K]

Answer:

2.57 e-9

Explanation:

The formula is H3O=10^-Ph

10^-8.59=2.57 e-9

6 0
3 years ago
Why is BCl3 a non-polar compound?​
Firdavs [7]

Answer:

BCI3 is a non polar compound because there is no neutral in it

4 0
3 years ago
Other questions:
  • determine the longest wavelength of light required to remove an electron from a sample of potassium metal, if the binding energy
    8·1 answer
  • Which statement best describes the greenhouse effect? It is a process by which plants are able to grow well in a warm, enclosed
    12·2 answers
  • A meteor contains 0.556 g of pb-206 to every 1.00 g of u-238. assuming that the meteor did not contain any pb-206 at the time of
    14·1 answer
  • Help please!
    11·1 answer
  • Compare the the volumes and densities of two pieces of lead: one with a mass of 25 g and the other with a mass of 75 g.
    12·1 answer
  • Lmfjwkwmwmwmamammanwnwnebebs. sss<br>sms<br>ask
    12·1 answer
  • 6. Below is a table comparing atoms of different elements. Write your
    5·1 answer
  • Plz help me with this:
    14·1 answer
  • Pls help me guys please please​ only 1 question choose
    7·1 answer
  • What mass of sugar and water is needed to make 40 g of 10% solution?​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!