What is a chemical reaction that absorbs heat called?
Answers
The chemical reaction that absorbs heat is called as an endothermic reaction.
An endothermic reaction is defined as a chemical reaction which is a thermodynamic process accompanied by an increase in enthalpy of the system.In this process, a system absorbs energy from the surroundings which is mainly thermal energy.
Thus an endothermic reaction leads to an increase in the temperature of the system with a decrease in the temperature of the surroundings.Endothermic reactions usually involve the formation of bonds which requires input of energy.In endothermic reactions, entropy of the surrounding decreases.
Many endothermic processes involve the physical changes rather the chemical changes.In an endothermic reaction ,the potential energy of products is greater than that of reactants.
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Answer:
Chemical reactions can be classified as either exothermic or endothermic. An exothermic reaction releases energy into its surroundings. An endothermic reaction, on the other hand, absorbs energy from its surroundings in the form of heat.
Explanation:
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Now to find number of particles we take number of moles x avogadros number.
1.5 x (6.02x10^23) = 9.03x10^23 molecules
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therefore t¾=18.72+½ of 18.72
we have 18.72+9.36=28.08days
the mass of the substance
c.
the change in temperature
b.
the specific heat of the substance
d.
the density of the sample
Answers
To calculate the amount of heat absorbed as a substance melts, the information which we don't need is density.
What is the formula to calculate absorbed heat?
The formula which we used to calculate the amount of involved heat in a chemical reaction is:
Q = mcΔT, where
- Q = absorbed heat
- m = mass
- c = specific heat
- ΔT = change in temperature
Hence the information which we don't need is density.
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Answers
1 L = 1000 mL
250 mL / 1000 = 0.25 L
M = n / V
M = 0.70 / 0.25
M = 2.8 mol/L⁻¹
hope this helps!
The correct answer is D, 2.8 M.
(2) 2.0 g of I2 at 30.°C
(3) 7.0 g of I2 at 40.°C
(4) 9.0 g of I2 at 20.°C
Answers
Answer : Option 4) 9.0 g of at 20°C
Explanation : Usually the average kinetic energy depends upon the state of the matter. Considering about the iodine at lower temperature the kinetic energy is found to be low. Whereas at higher temperature has higher kinetic energy value.
From the kinetic energy equation it can be easily related that K.E. is directly proportional to the temperature.
Refer the attached image for the relationship of temperature with kinetic energy.
b. covalent
c. oxygenated
d. non-metallic