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
meriva
3 years ago
14

Calculate the enthalpy change (in joules) involved in converting 5.00 grams of water at 14.0 °c to steam at 115 °c under a const

ant pressure of 1 atm. the specific heats of ice, liquid water, and steam are, respectively, 2.03, 4.18, 1.84 j/g-k, and for water δhfusion = 6.01 kj/mole and δhvap = 40.67 kj/mole. hints
Chemistry
1 answer:
tensa zangetsu [6.8K]3 years ago
7 0

Enthalpy change is the term given to the concentration of the heat absorbed or evolved in a reaction carried out at a constant pressure. It is given by the symbol ΔH.

Enthalpy change = m (Cwater × dT + Hvap + Csteam × dT

dHvap = 40.67 kJ/mol = 40.67 × 103/18 = 2259.4 J/g

Enthalpy change = 5.00 [4.18 × (100-14) + 2259.4 + 1.84 × (115-100)]

= 13232.4 J

You might be interested in
Help me i mark brain thing
o-na [289]

Answer:

Becuase they can go through mountains and hills, they curve of of those.

5 0
2 years ago
It would be nice if someone HELPED. During an experiment, you observe that two charged balloons repel each other. When you bring
jeka57 [31]

Answer:

They are similarly charged, which is why they repel each other.

8 0
2 years ago
Read 2 more answers
Why is hydrogen a non metal, usually placed with group I element in the periodic table, even though it does not show a metallic
podryga [215]

because it has ns1 electron configuration like the alkali metals

3 0
2 years ago
A galvanic (voltaic) cell consists of an electrode composed of zinc in a 1.0 M zinc ion solution and another electrode composed
MariettaO [177]

Answer:

The E°cell for the galvanic cell is 1.56 V.

Explanation:

A galvanic cell is a device that uses redox reactions to convert chemical energy into electrical energy. The chemical reaction used is always spontaneous.

Oxide-reduction reactions, also called redox, involve the transfer or transfer of electrons between two or more chemical species. In these reactions two substances interact: the reducing agent and the oxidizing agent.

The gain of electrons is called reduction and the loss of electrons oxidation. That is to say, there is oxidation whenever an atom or group of atoms loses electrons (or increases its positive charges) and in the reduction an atom or group of atoms gains electrons, increasing its negative charges or decreasing the positive ones.

The species that supplies electrons is the reducing agent (that is, it is that species that oxidizes, yielding electrons and increasing its positive charge, or decreasing the negative one causing the reduction of the other species) and the one that gains them is the oxidizing agent ( that is, it is that species that is reduced, capturing electrons and increasing its negative charge, or decreasing its positive charge, causing oxidation of the other species).

The galvanic cell works as follows: In the anodic half-cell oxidations occur, while in the cathodic half-cell reductions occur. The anode electrode, conducts the electrons that are released in the oxidation reaction, to the metallic conductors. These electrical conductors conduct the electrons and carry them to the cathode electrode; the electrons thus enter the cathode half-cell and the reduction takes place in it.

To determine the oxidizing and reducing agent you must first know the reduction potentials. For this you consult the list of standard reduction potentials. In this list you can see that the semi-reactions that occur with their corresponding potentials are:

Ag⁺ + e⁻ ⇒ Ag E°= 0.80 V

Zn²⁺ + 2 e⁻ ⇒ Zn E° -0.76 V

The species that has the greatest potential for reduction will be the species that will be reduced, that is, it will be the oxidizing agent. In this case, it will be the experience corresponding to silver (Ag). Therefore, to obtain the redox reaction, the half-reaction corresponding to zinc (Zn) must be reversed to be an oxidation, keeping its E ° value constant. Then:

Reduction: Ag⁺ + e⁻ ⇒ Ag E°= 0.80 V

Oxidation: Zn ⇒ Zn²⁺ + 2 e⁻ E° -0.76 V

So: <em>E°cell=Ereduction - Eoxidation</em>

Or what is the same<em> E°cell=Ecathode - Eanode </em>because the reduction always occurs in the cathode and oxidation in the anode.

E°cell=0.80 V - (-0.76) V

<em>E°cell= 1.56 V</em>

Then <u><em>the E°cell for the galvanic cell is 1.56 V.</em></u>

6 0
3 years ago
Suppose a phosphorus atom forms a bond with a fluorine atom. What type of bond must between these two elements?
Liula [17]

Answer:

Covalent bond

Explanation:

they will make a covalent bond with each other because both are non- metals and have a low electronegativity difference.

6 0
3 years ago
Other questions:
  • The area of the gold electrodes on the quartz crystal microbalance at the opening of Chapter 2 is 3.3 mm^2. One gold electrode i
    13·1 answer
  • A substance that increases the rate of a reaction without being involved itself is called a _______
    13·1 answer
  • A sample of gas is at 273°K and 2.00 atm with a volume of 6.00 liters. When the gas is compressed to 3.00 liters and the pressur
    7·1 answer
  • describe at least two air pollutants that destroy the ozone layer. discuss the origination of these pollutants and a plan for re
    13·1 answer
  • In which state of matter do the particles spread apart and fill all the space available to them?
    13·2 answers
  • What what is the density. Correct units please.
    9·1 answer
  • A student uses 0.0821 L• atm/mol • K as the value of the gas constant. What is most likely true about the variables in the ideal
    8·1 answer
  • If a object started moving have did it’s velocity change?
    5·1 answer
  • Microorganisms have a major role in maintaining soil biodiversity. They recycle nutrients in ecosystems and decompose organic ma
    13·1 answer
  • Which of the following elements will lose electrons to form an ion
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!