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
Luden [163]
3 years ago
11

. How much energy is lost by a 30.0g sample of water that decreases in temperature from 56.7C to 25.0C?

Chemistry
1 answer:
lbvjy [14]3 years ago
8 0

Answer:

Q = -3980.9 j

Explanation:

Given data:

Mass of sample = 30 g

Initial temperature = 56.7 °C

Final temperature = 25 °C

Specific heat of water = 4.186 j/g.°C

Amount of heat released = ?

Formula:

Q = m.c.ΔT

Q = heat released

m = mass of sample

c = specific heat of given sample

ΔT = change in temperature

Solution:

ΔT = T2 -T1

ΔT = 25 °C - 56.7 °C = - 31.7°C

Q = m.c.ΔT

Q = 30 g × 4.186 j/g.°C ×  - 31.7°C

Q = -3980.9 j

You might be interested in
Gas hydrates are compact chemical structures made of natural gas and
Oksana_A [137]

Answer:


                  Option-B (water) is the correct answer.


Explanation:

                 Gas hydrates are made up of Solid-Ice water and a natural gas like Methane gas trapped in the lattice of ice water. Gas hydrates are mainly found deep down in the sea where the atmospheric pressure is greater than 1 atm.


Generally Gas hydrates have two main applications. 

                             a) It stabilizes the sea floor other wise its melting will cause land sliding in sea floor. 

                             b) Secondly, it traps a green house gases like Methane, if released these gases could produce Climate changes.

6 0
3 years ago
Read 2 more answers
Which of the following tool components is unlikely to present a hazard
nydimaria [60]

Gloves is the tool component which will unlikely present a hazard in this scenario.

<h3>What is Hazard?</h3>

This is referred to as potential source of harm when performing various types of activities.

Gloves will unlikely cause harm as it is used to prevent the risk of electric shock when handling electrical devices which is why it is the most appropriate choice.

Read more about Hazard here brainly.com/question/7310653

#SPJ1

6 0
2 years ago
No pure elements are liquids at room temperature.
Luden [163]
Mercury and Bromine are liquid at room temperature.
8 0
3 years ago
"How many bits of entropy are there in the result of throwing a pair of four-sided dice (each side numbered 1, 2, 3, 4) and summ
baherus [9]

Answer:

Please find the complete question in the attached file.

Explanation:

8 0
3 years ago
What is the ph category of each of the following i need help plz
shepuryov [24]

1. base

2. neutral

3. acid

4. base

If this is what you meant, hope it helps

4 0
3 years ago
Other questions:
  • The crystal lattice structure of ionic compounds is responsible for which set of characteristic properties?
    9·2 answers
  • The sea water has 8.0x10^-1 cg of element strontium. Assuming that all strontium could be recovered, how many grams of strontium
    11·1 answer
  • Which element is represented by the following Bohr model? *<br> p = 11<br> n 12
    7·1 answer
  • How many formula units are in 325 grams of iron (III) chloride?
    12·1 answer
  • 03<br>A force of 20 N acts upon a 5 kg block. Calculate the acceleration of the object.​
    7·1 answer
  • Atoms or helium nickel would represent _____
    9·1 answer
  • Can someone help me with all of those pls!!!!
    7·1 answer
  • What observations and reasoning led to the development of Hubble's Law?
    6·1 answer
  • Reaction:<br> HCI + NaOH -&gt;<br> NaCl + H20
    8·1 answer
  • What are the compounds that you can find in mayonnaise
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!