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
3241004551 [841]
3 years ago
15

Gerald's science teacher mixed room temperature samples of hydrochloric acid and sodium hydroxide in a large beaker. The solutio

n still looked clear like water, but when the students carefully touched the beaker one at a time, it felt warm to the touch. Why did the beaker most likely feel warm?
A. The two liquids were not soluble in water.
B. The release of a gas heated the solution.
C. The energy of mixing warmed the solution.
D. A chemical reaction was producing a new substance.
Chemistry
1 answer:
shutvik [7]3 years ago
8 0

Answer: Option (D) is the correct answer.

Explanation:

The chemical reaction equation will be as follows.

      HCl + NaOH \rightarrow NaCl + H_{2}O

This means a new substance has been formed and a chemical change has taken place.

A chemical reaction in which heat energy is absorbed by the reactant molecules is known as an endothermic reaction.  

For example, A + B + Heat \rightarrow AB

On the other hand, a chemical reaction in which heat energy is released by the reactant molecules is known as an exothermic reaction.  

For example, C + D \rightarrow CD + Heat is an exothermic reaction.

Thus, we can conclude that in the given situation the beaker most likely felt warm because a chemical reaction was producing a new substance.

You might be interested in
How much heat (in Joules) is needed to raise the temperature of 257g of ethanol (cethanol=2.4 J/g°C) by 49.1°C?
Sonbull [250]

Answer:

Q = 30284.88 j

Explanation:

Given data:

Mass of ethanol = 257 g

Cp = 2.4 j/g.°C

Chnage in temperature = ΔT = 49.1°C

Heat required = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Now we will put the values in formula.

Q = 257 g× 2.4 j/g.°C × 49.1 °C

Q = 30284.88 j

8 0
3 years ago
how much hydrogen will be released during the interaction of potassium weighing 8 grams with hydrochloric acid
krek1111 [17]

Answer:

With an understanding of the ideal gas laws, it is now possible to apply these principles to chemical stoichiometry problems. For example, zinc metal and hydrochloric acid (hydrogen chloride dissolved in water) react to form zinc (II) chloride and hydrogen gas according to the equation shown below:

2 HCl (aq) + Zn (s) → ZnCl2 (aq) + H2 (g)

Explanation:

\large\colorbox{yellow}{ɪ ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs}

\large\colorbox{lightblue}{Xxᴊᴀsʜ13xX}

4 0
2 years ago
Mass = 35g Volume = 7cm3 What is the Density?​
olga_2 [115]

Answer:

5 g/cm^3

Explanation:√3V=1.91293cm

7 0
3 years ago
What is the purpose of a drying agent in the work up of an organic reaction?
vladimir1956 [14]

Answer:To absorb small amounts of water in an organic solution.

Explanation:A drying agent is added to absorb small amounts of water, usually from an organic solution after its separation from an aqueous solution.

3 0
2 years ago
I need the answer for number 3 please I need to check if I’m correct?
balandron [24]
Yes you are correct hope you do well
5 0
3 years ago
Other questions:
  • Explain the difference betweeen mass and volume
    13·1 answer
  • Which is not caused by human interactions with the Earth system?
    15·1 answer
  • Inversion is a type of mutation that
    11·2 answers
  • James mixed Barium and oxide. what does he get? how does it work?
    7·1 answer
  • A jet is goes from 180km/s to 139km/s in 22 seconds. What is it's acceleration?
    10·1 answer
  • Which of the following molecules is polar?
    9·1 answer
  • But Are Punnett square percentages always correct?
    5·1 answer
  • What is ionic bonding<br>​
    6·2 answers
  • Calculate the pH when 60.0 mL of 0.200 M HBr is mixed with 30.0 mL of 0.400 M CH₃NH₂ (Kb = 4.4 × 10⁻⁴).
    10·1 answer
  • Describe how the pH of anti-acid powder can be determined
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!