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
igomit [66]
4 years ago
9

Calculate the entropy change when a. two moles of H2O(g) are cooled irreversibly at constant p from 120°C to 100°C. b. one mole

of H2O(g) is expanded at constant pressure of 2 bar from an original volume of 20 L to a final volume of 25 L. You can consider the gas to be ideal. c. one hundred grams of H2O(s) at -10°C and 1 bar are heated to H2O(l) at +10°C and 1 bar.

Chemistry
1 answer:
alexira [117]4 years ago
3 0

Answer:

The problem solution is given in the attachments.

You might be interested in
What is a graph?
Keith_Richards [23]

*Visual

*Independent

*Dependent

5 0
3 years ago
☝️☝️☝️help☝️☝️☝️!!!!
nataly862011 [7]
8. A. Density is independent of size (an intensive property).
9. B. The highest density is 1786 g/20cm^3, or 89.3 g/cm^3. The least is 512 g/20cm^3, or 25.6 g/cm^3. Therefore, the difference is 89.3 - 25.6, or 63.7 g/cm^3.
10. C. A bottle filled with air weighs less than one filled with marshmallows, because air is less dense than marshmallows.
11. D. The number represents the number of protons in the nucleus of the atom, as well as the atomic number of the element.
12. C. The number represents the atomic mass of the element, which is determined based on the relative abundance of each form of the element.
7 0
3 years ago
how many electrons does chlorine need to gain to become an ion? will it become positively charged cation or negatively charged a
I am Lyosha [343]
One electron and it becomes negatively charged
6 0
3 years ago
A scientist has a container with a substance inside. At first, the molecules in the substance move away from each other. Later,
ArbitrLikvidat [17]
The answers here is B) Before, the substance was a gas, later it was a liquid.

Gas particles move freely and away from each other. However, liquid particles move around each other.

Hope this helps! :)(
7 0
3 years ago
What mass of H₂ is needed to react with 8.75 g of O₂ according to the following equation: O2(g) + H2(g) → H₂O(g)?
FromTheMoon [43]

Explanation:

For reacting with 8.75 grams of oxygen, 1.08 grams of hydrogen is required.

The given balanced equation has been:

\rm O_2\;+\;2\;H_2\;\rightarrow\;H_2OO2+2H2→H2O

From the equation, 1 mole of oxygen reacts with 2 mole of hydrogen to give 1 mole of water.

The mass of oxygen has been: 8.75 g,

Moles = \rm \dfrac{weight}{molecular\;weight}molecularweightweight

Moles of oxygen = \rm \dfrac{8.75}{32}328.75

Moles of oxygen = 0.27 mol

Since,

1 mole Oxygen = 2 mole hydrogen

0.21 mol oxygen = 0.54 mol hydrogen

Mass of hydrogen = moles \times× molecular weight

Mass of hydrogen = 0.54 \times× 2

Mass of hydrogen = 1.08 grams.

Thus, for reacting with 8.75 grams of oxygen, 1.08 grams of hydrogen is required.

6 0
2 years ago
Other questions:
  • Convert this molecular formula into a structure that is consistent with the usual bonding patterns. c3h8
    7·1 answer
  • Why does a running dear have kintec energy? Hey pls help I could really use ur help
    8·1 answer
  • What data should be plotted to show that experimental concentration data fits a zeroth-order reaction?
    15·1 answer
  • What is the difference between "4 P" and "P4"? A) There is no difference, they both represent the same thing. B) 4 P represents
    9·1 answer
  • Pls help me with chem equilibrium part 2!!!! Will mark brainliest
    11·1 answer
  • Which events occurred during the space race
    6·2 answers
  • Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin pla
    13·1 answer
  • Please Help In Chemistry
    6·1 answer
  • How many valence electrons do the halogens have
    7·1 answer
  • Sevin, the commercial name for an insecticide used to protect crops such as cotton, vegetables, and fruit, is made from carbamic
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!