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
Svetradugi [14.3K]
3 years ago
6

When a solid changes to gas, what is it called??

Chemistry
1 answer:
Kay [80]3 years ago
8 0
When solid changes it's phase to gas without forming liquid, process is called sublimation.
You might be interested in
Round off the following to three significant figures 0.032000000cg
tino4ka555 [31]
<span>0.032000000 cg

Rounding off  ........>

0.0320 cg

The last zero means the measurement is accurate to that digit
</span>
6 0
3 years ago
How do take off my question when I don't have a question?
kotegsom [21]
Why would you ask a question if you didnt have a question?

Just get someone to report it, and itll be deleted
7 0
3 years ago
Read 2 more answers
While a certain isotope decays, it emits photons. What kind of decay is happening?
gizmo_the_mogwai [7]
The correct answer is Gamma decay. It happens after beta and alpha decay because what's left after those two can enter a new process of gamma decay. This releases gamma rays which is a more complex term for the photons that you mentioned before. These rays can be dangerous for humans so care not to get caught in them.
6 0
3 years ago
Read 2 more answers
Can someone's help me with this
labwork [276]
Oh ok just wait a minute
7 0
3 years ago
Given the following heats of combustion. CH3OH(l) + 3/2 O2(g) CO2(g) + 2 H2O(l) ΔH°rxn = -726.4 kJ C(graphite) + O2(g) CO2(g) ΔH
sergeinik [125]

Answer:

The standard enthalpy of formation of methanol is, -238.7 kJ/mole

Explanation:

The formation reaction of CH_3OH will be,

C(s)+2H_2(g)+\frac{1}{2}O_2\rightarrow CH_3OH(g),\Delta H_{formation}=?

The intermediate balanced chemical reaction will be,

C(graphite)+O_2(g)\rightarrow CO_2(g), \Delta H_1=-393.5kJ/mole..[1]

H_2(g)+\frac{1}{2}O_2(g)\rightarrow H_2O(l), \Delta H_2=-285.8kJ/mole..[2]

CH_3OH(g)+\frac{3}{2}O_2(g)\rightarrow CO_2(g)+2H_2O(l) , \Delta H_3=-726.4kJ/mole..[3]

Now we will reverse the reaction 3, multiply reaction 2 by 2  then adding all the equations, Using Hess's law:

We get :

C(graphite)+O_2(g)\rightarrow CO_2(g) , \Delta H_1=-393.5kJ/mole..[1]

2H_2(g)+2O_2(g)\rightarrow 2H_2O(l) ,\Delta H_2=2\times (-285.8kJ/mole)=-571.6kJ/mol..[2]

CO_2(g)+2H_2O(l)\rightarrow CH_3OH(g)+\frac{3}{2}O_2(g) ,\Delta H_3=726.4kJ/mole [3]

The expression for enthalpy of formation of C_2H_4 will be,

\Delta H_{formation}=\Delta H_1+2\times \Delta H_2+\Delta H_3

\Delta H=(-393.5kJ/mole)+(-571.6kJ/mole)+(726.4kJ/mole)

\Delta H=-238.7kJ/mole

The standard enthalpy of formation of methanol is, -238.7 kJ/mole

4 0
3 years ago
Other questions:
  • A generic element, G, is composed of two isotopes, 132G and 128G. 132G has a natural abundance of 90% and an isotopic mass of 13
    13·1 answer
  • (Please help I will give brainliest to whoever answers)Classify each of the following as either an element, compound, mechanical
    8·2 answers
  • When a highly reactive metal, such as lithium (Li), is mixed with a highly reactive nonmetal, such as chlorine (Cl), they will m
    7·1 answer
  • It is winter where jenna lives. Its been snowing all day, but now the snow has changed to sleet and then to freezing rain. What
    5·1 answer
  • A chemist has a block of aluminum metal (density is 2.7 g/mL). The block weighs 1.5. What is the volume of the aluminum block?
    10·1 answer
  • Which of the following substance is usted up during photosynthesis
    14·1 answer
  • (vii). Give two uses of chlorine gas.​
    8·1 answer
  • Calcium chloride solution reacts with sodium carbonate solution
    8·1 answer
  • Someone pls help me I will mark you as brain
    5·1 answer
  • If there are more shells does the nuclear charge decrease
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!