Answer: An endothermic reaction occurs when energy is absorbed from the surroundings in the form of heat. Conversely, an exothermic reaction is one in which energy is released from the system into the surroundings.
How are endothermic and exothermic reactions the same?
They are both changes in which energy is present.
Explanation:
14.626 Gallons because yeah dhhsjsjshshsh
Answer:- The substance is Propane and right choice is C.
Solution:- 10140000 J of heat is used to boil 28.47 kg at 298 K. Here, the important thing is, the liquid is changing to vapor and the temperature is not changing means it's a phase change. So, the formula used for this is:
where, q is the heat energy, m is mass and is the enthalpy of vaporization.
Let's rearrange the formula for as:
=
Let's plug in the values:
=
=
If we round this then it is . Hence, the right choice is C. propane.
Answer:
Explanation:
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In this case, since the definition of by-mass percent is:
Whereas we know the percent as 11.9 % and the mass of the solution as 225g, so we compute the grams of solute as follows:
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