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
katovenus [111]
3 years ago
11

A) How much energy would be required to melt 500 grams of ice at 0°C to water at 0°C?

Chemistry
1 answer:
baherus [9]3 years ago
4 0

Heat required = Q = 40 kcal

<h3>Further explanation</h3>

Given

mass of 500 g ice

Required

Heat required

Solution

The heat to change the phase can be formulated :  

  • Q = m.Lf (melting/freezing)  
  • Q = m.Lv (vaporization/condensation)  

Lf=latent heat of fusion  

Lv=latent heat of vaporization  

Lf for water = 334 kj/kg=6.01 kJ/mol = 80 cal/g

Phase change(ice to water)

Q=  500 g x 80 cal/g

Q = 40 kcal

You might be interested in
What is the systematic name of PbO?
lilavasa [31]
Lead Oxide

Pb is Lead

O is Oxygen

I hope this helped
6 0
3 years ago
Read 2 more answers
What element in the second period has the largest atomic radius?
madreJ [45]

Answer:

b. lithium

Explanation:

furthest to the left in second period

3 0
3 years ago
2. Write the chemical equations for the neutralization reactions that occurred when HCL and NaOH were added to the buffer soluti
lutik1710 [3]

Answer:

HCI(aq)+CH3COONa(s) ----> CH3COOH(aq)+NaCl(s)

NaOH(aq)+CH3COOH(aq) ----> CH3COONa(s)+H2O(l)

Explanation:

A buffer is a solution that resists changes in acidity or alkalinity. A buffer is able to neutralize a little amount of acid or base thereby maintaining the pH of the system at a steady value.

A buffer may be an aqueous solution of a weak acid and its conjugate base or a weak base and its conjugate acid.

The equations for the neutralizations that occurred upon addition of HCl or NaOH are;

HCI(aq)+CH3COONa(s) ----> CH3COOH(aq)+NaCl(s)

NaOH(aq)+CH3COOH(aq) ----> CH3COONa(s)+H2O(l)

5 0
3 years ago
100 POINTS ANSWER FAST
alex41 [277]
I believe the answer is a because 2 times 12 is 24. Hope this helped
8 0
3 years ago
Read 2 more answers
The number of covalent bonds that an atom can make is determined by
diamong [38]
The number of covalent bonds that an atom can make is determined by the no. of electrons needed to form a duplet or octet of electron by each of the atom.
5 0
3 years ago
Other questions:
  • How are landforms and faults related
    11·1 answer
  • Which of the following states that an orbital can obtain two electrons only if all other orbitals at that sublevel contain at le
    6·1 answer
  • An ion has a charge of +1 and 15 protons how many electrons does it have?
    6·2 answers
  • What is the mass prevent of manganese (mn) in potassium permanganate (KMnO4)​
    6·1 answer
  • What is the density of an object that has a mass of 21 g and a volume of 9 ml?
    11·1 answer
  • Water in contact with air is acidic, rather than neutral,
    15·1 answer
  • If the pressure on 36.0 milliliters of a gas at STP is changed to a pressure of 25.3 kPa at constant temperature, the new volume
    6·2 answers
  • The effects of acid rain include:
    9·1 answer
  • Please answer the question
    13·2 answers
  • A 684.6 mL sample of carbon dioxide was heated to 387 K. If the volume of the carbon dioxide sample at 387 K is 933.9 mL, what w
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!