What is heat?
(in scientific vocab)
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my guess i dont know exactly but heat is energy
heat absorbed or radiated during a change of phase at a constant temperature and pressure. specific heat. the heat required to raise the temperature of one gram of a substance one degree centigrade. heat of condensation. heat liberated by a unit mass of gas at its boiling point as it condenses into a liquid.
Related Questions
To calculate the amount of heat absorbed as a substance melts, which of the following information is NOT needed?a.the mass of the substancec.the change in temperatureb.the specific heat of the substanced.the density of the sample
Which of these subatomic particles adds the most mass to an atom?a. proton b. photon c. electron d. It depends on what the element is. An atom with two protons, three neutrons and two electrons would have a mass of about how many atomic mass units? a. 2 b. 3 c. 5 d. 7
For the amino acid alanine, the major species in solution at pH 7 is the zwitterionic form, which has a negatively charged carboxylic acid group and a positively charged amino group. There is a less common neutral form in which neither group is charged. The carboxylic acid group of alanine has a p K a of 3 . The amino group of alanine has a p K a of 8 . Estimate the ratio of the concentration of the neutral amino acid species to the zwitterionic species at pH 7 .
After the collapse of a nebular cloud, atoms begin gravitating together to form a condensed center. What happens next in the star formation process?
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Answer:
Q = 1760 cal or 7356.8 J
Explanation:
The general expression to use to calculate heat is the following:
Q = m*Cp*ΔT (1)
Where:
Q = heat in cal or joules
m = mass of the compound.
Cp = specific heat of the compound
T: change in temperature (K) or T2 - T1
Now, the reported Cp for water is 1 cal/g °C and 4.18 J / g °C, we will use both to calculate the heat in calories and joules:
Using calories we have:
Q = 32 * 1 * (80 - 25)
Q = 1760 cal
This is the heat in calories.
Using joules we have:
Q = 32 * 4.18 * (80 - 25)
Q = 7356.8 J
This is the heat expressed in Joules.
(32.0g)(4.18J/g°C)(55°C)= 7360J
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I ( iodine ) = + 7
O ( oxygen ) = - 2
hope this helps!
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Answer:
If you change the number of protons an atom has, it becomes a different element. If you change the number of nutrons it has, it becomes a different isotope.
Explanation:
B) Cs
C) O
D) F
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Yes. The NaCl will precipitate.
Yes. The BaSO4 will precipitate.
Yes. Both the NaCl and the BaSO4 will precipitate.
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Yes. The BaSO₄ will precipitate in this type of double replacement reaction.
What is Double replacement reaction?
This is a type of reaction in which two reactants exchange ions to form two new compounds.
Na₂SO₄ (aq) + BaCl₂ (aq) ⇒ NaCl(aq)+ BaSO₄(s)
The precipitate which will be seen at the bottom of the reaction flask is solid BaSO₄.
Read more about Double replacement reaction here brainly.com/question/5082638
Answer: The correct answer is Yes, will precipitate.
Explanation:
Double displacement reaction is defined as the reaction in which exchange of ions takes place.
Precipitate is defined as the insoluble salt which emerges when two different solutions are mixed together. It settles down at the bottom of the flask after some time.
The chemical equation for the reaction of sodium sulfate and barium chloride follows:
Barium sulfate settles down in the reaction flask and is considered as a precipitate.
Hence, the correct answer is Yes, will precipitate.
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The balanced reaction is:
Mg (s) + 2HCl (aq) = H2 (g) + MgCl2 (aq)We are given the amount of reactants to be reacted. This will be the starting point of the calculations.
.125 L HCl solution (6.0 mol HCl / L solution) ( 1 mol H2 / 2 mol HCl ) ( 2.02 g H2 / 1 mol H2 ) = 0.76 g H2