Heat Capacities and Thermodynamic Properties of Hungchaoite and Mcallisterite
Abstract
:1. Introduction
2. Experimental
2.1. Chemicals
2.2. Synthesis
2.3. Identification and Analytical Methods
2.4. Calorimetry and Experiment Method
3. Results and Discussion
3.1. Heat Capacities
3.2. Enthalpy, Entropy, and Gibbs Free Energy
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Sample Availability: Samples of the compounds are available from the authors. |
Component Content | MgO/wt % | B2O3/wt % | H2O/wt % | n (MgO:B2O3:H2O) |
---|---|---|---|---|
Hungchaoite, MgB4O7·9H2O | ||||
Experimental value | 11.86 | 40.79 | 47.35 | 1:2.04:8.95 |
Theoretical value | 11.80 | 40.75 | 47.45 | 1:2.00:9.00 |
Relative error (%) | 0.51 | 0.05 | 0.20 | - |
Mcallisterite, MgB6O10·7.5H2O | ||||
Experimental value | 10.50 | 54.60 | 34.87 | 1:3.00:7.42 |
Theoretical value | 10.49 | 54.35 | 35.16 | 1:3.00:7.50 |
Relative error (%) | 0.10 | 0.46 | 0.82 | - |
Hungchaoite, MgB4O7·9H2O | |||||
306.15 | 452.21 | 323.15 | 525.99 | 340.15 | 566.32 |
307.15 | 460.92 | 324.15 | 529.57 | 341.15 | 567.48 |
308.15 | 467.61 | 325.15 | 533.26 | 342.15 | 568.58 |
309.15 | 472.84 | 326.15 | 536.68 | 343.15 | 569.74 |
310.15 | 477.79 | 327.15 | 539.99 | 344.15 | 570.90 |
311.15 | 482.20 | 328.15 | 543.34 | 345.15 | 571.92 |
312.15 | 486.20 | 329.15 | 546.07 | 346.15 | 573.19 |
313.15 | 490.12 | 330.15 | 548.84 | 347.15 | 574.59 |
314.15 | 493.50 | 331.15 | 551.19 | 348.15 | 575.85 |
315.15 | 496.89 | 332.15 | 553.48 | 349.15 | 577.12 |
316.15 | 500.27 | 333.15 | 555.60 | 350.15 | 578.55 |
317.15 | 503.72 | 334.15 | 557.54 | 351.15 | 580.12 |
318.15 | 507.23 | 335.15 | 559.25 | 352.15 | 581.90 |
319.15 | 510.92 | 336.15 | 560.93 | 353.15 | 583.84 |
320.15 | 514.61 | 337.15 | 562.39 | 354.15 | 586.00 |
321.15 | 518.37 | 338.15 | 563.76 | 355.15 | 587.70 |
322.15 | 522.47 | 339.15 | 565.13 | ||
Mcallisterite, MgB6O10·7.5H2O | |||||
306.15 | 412.82 | 323.15 | 456.70 | 340.15 | 485.82 |
307.15 | 417.28 | 324.15 | 458.50 | 341.15 | 486.97 |
308.15 | 420.89 | 325.15 | 460.50 | 342.15 | 488.04 |
309.15 | 424.16 | 326.15 | 462.46 | 343.15 | 489.08 |
310.15 | 427.54 | 327.15 | 464.38 | 344.15 | 490.08 |
311.15 | 430.26 | 328.15 | 466.34 | 345.15 | 491.04 |
312.15 | 432.95 | 329.15 | 468.30 | 346.15 | 491.96 |
313.15 | 435.49 | 330.15 | 470.06 | 347.15 | 492.85 |
314.15 | 437.87 | 331.15 | 471.83 | 348.15 | 493.61 |
315.15 | 440.06 | 332.15 | 473.56 | 349.15 | 494.38 |
316.15 | 442.14 | 333.15 | 475.29 | 350.15 | 495.15 |
317.15 | 444.25 | 334.15 | 477.06 | 351.15 | 495.92 |
318.15 | 446.25 | 335.15 | 478.67 | 352.15 | 496.76 |
319.15 | 448.28 | 336.15 | 480.32 | 353.15 | 497.72 |
320.15 | 450.47 | 337.15 | 481.86 | 354.15 | 498.61 |
321.15 | 452.58 | 338.15 | 483.24 | 355.15 | 499.61 |
322.15 | 454.66 | 339.15 | 484.59 |
Hungchaoite, MgB4O7·9H2O | ||||
298.15 | 400.86 | |||
300.15 | 415.14 | 0.8161 | 2.7281 | −0.0027 |
305.15 | 452.21 | 2.9743 | 9.8585 | −0.0340 |
310.15 | 477.79 | 5.2814 | 17.3573 | −0.1019 |
315.15 | 496.89 | 7.7153 | 25.1415 | −0.2081 |
320.15 | 514.61 | 10.2557 | 33.1389 | −0.3537 |
325.15 | 533.26 | 12.8850 | 41.2877 | −0.5397 |
330.15 | 548.84 | 15.5875 | 49.5357 | −0.7667 |
335.15 | 559.25 | 18.3498 | 57.8397 | −1.0351 |
340.15 | 566.32 | 21.1609 | 66.1652 | −1.3452 |
345.15 | 571.92 | 24.0119 | 74.4855 | −1.6968 |
350.15 | 578.55 | 26.8960 | 82.7816 | −2.0900 |
355.15 | 587.70 | 29.8090 | 91.0418 | −2.5245 |
Mcallisterite, MgB6O10·7.5H2O | ||||
298.15 | 387.81 | |||
300.15 | 395.16 | 0.7830 | 2.6175 | −0.0026 |
305.15 | 412.09 | 2.8020 | 9.2881 | −0.0323 |
310.15 | 427.54 | 4.9007 | 16.1098 | −0.0957 |
315.15 | 440.06 | 7.0701 | 23.0482 | −0.1936 |
320.15 | 450.47 | 9.3016 | 30.0732 | −0.3264 |
325.15 | 460.50 | 11.5876 | 37.1584 | −0.4944 |
330.15 | 470.06 | 13.9213 | 44.2810 | −0.6980 |
335.15 | 478.67 | 16.2966 | 51.4213 | −0.9373 |
340.15 | 485.82 | 18.7081 | 58.5632 | −1.2122 |
345.15 | 491.04 | 21.1511 | 65.6933 | −1.5229 |
350.15 | 495.15 | 23.6221 | 72.8009 | −1.8691 |
355.15 | 499.61 | 26.1179 | 79.8781 | −2.2508 |
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Song, J.; Yuan, F.; Li, L.; Guo, Y.; Deng, T. Heat Capacities and Thermodynamic Properties of Hungchaoite and Mcallisterite. Molecules 2019, 24, 4470. https://doi.org/10.3390/molecules24244470
Song J, Yuan F, Li L, Guo Y, Deng T. Heat Capacities and Thermodynamic Properties of Hungchaoite and Mcallisterite. Molecules. 2019; 24(24):4470. https://doi.org/10.3390/molecules24244470
Chicago/Turabian StyleSong, Jiangtao, Fei Yuan, Long Li, Yafei Guo, and Tianlong Deng. 2019. "Heat Capacities and Thermodynamic Properties of Hungchaoite and Mcallisterite" Molecules 24, no. 24: 4470. https://doi.org/10.3390/molecules24244470