Answer:
32 K is approx. -241.15° C
Answer:
D. -120.9 kJ
Explanation:
According to Hess's law ,the total enthalpy change for a reaction is the sum of all changes regardless of the stages or the steps of the reaction.
....(1)
![CaO + H_{2}O\rightarrow Ca(OH)_{2}\ (\Delta H = - 65 \ kJ)](https://tex.z-dn.net/?f=%3Cstrong%3ECaO%20%2B%20H_%7B2%7DO%5Crightarrow%20Ca%28OH%29_%7B2%7D%5C%20%3C%2Fstrong%3E%28%5CDelta%20H%20%3D%20-%2065%20%5C%20kJ%29)
(this reaction should be reversed in order to reach the required reaction )
On reversing the reaction the sign of
get reversed.
(In this case change sign from '-' to'+'. Hence
= + 65 kJ)
....(1)
......(2)
Adding equation (1) and (2)
![Ca(OH)_{2} + 2HCl \rightarrow CaCl_{2} + 2H_{2}O[tex][tex]Delta H = - 186 + 65 = - 121\kJ](https://tex.z-dn.net/?f=%3Cstrong%3ECa%28OH%29_%7B2%7D%20%2B%202HCl%20%5Crightarrow%20CaCl_%7B2%7D%20%2B%202H_%7B2%7DO%3C%2Fstrong%3E%5Btex%5D%3C%2Fp%3E%3Cp%3E%5Btex%5D%3Cstrong%3EDelta%20H%20%3D%20-%20186%20%2B%2065%20%3D%20-%20121%5CkJ%3C%2Fstrong%3E)
(It is nearly equal to -120.9 kJ)
Fluorine, chlorine, iodine (the halogens), oxygen, sulphur, hydrogen
Answer:
What can cause excessive pressure on the high side of an active self-contained recovery device? A closed recovery tank inlet valve or excessive air or other non condensables in the recovery tank (either A or B) Portable refillable tanks or containers used to ship recovered refrigerants must meet what standard(s)?
Explanation:
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<span>they are the last organisms to appear.
hope that helps
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