2. This dress has been designed by Calven Klen. (вообще-то пишется Calvin Klein) A new bridge is being built. A pink sweater will be knitted for me by my mother. James was sent an invitation by Karen.
3. She said she enjoyed travelling a lot. He said he had visited Spain the previous year. He said travelling solo was the best thing he'd ever done. Tim said he was looking for an interesting destination.
4. 1) unless 2) if 3) if
5. take, is looking, tastes, will trip, was cooking.
для реакции Са+0,5О2=СаО (для реакции 2Са+О2=2СаО все умножить на 2)
ΔНº298 =–635,09 кДж/моль
ΔSº298 = 38,07 – 41,63 – 0,5 ∙ 205,04 = –106,08 Дж/(моль∙К)
ΔСрº1000(Са) = 22,22 + 13,93∙10^-3∙1000 = 36,15 Дж/(моль∙К)
ΔСрº1600(Са) = 22,22 + 13,93∙10^-3∙1600 = 44,51 Дж/(моль∙К)
ΔСрº1000(СаО) = 49,62 + 4,52∙10^-3∙1000 – 6,95∙10^5/1000² = 53,45 Дж/(моль∙К)
ΔСрº1600(СаО) = 49,62 + 4,52∙10^-3∙1600 – 6,95∙10^5/1600² = 56,58 Дж/(моль∙К)
ΔСрº1000(О2) = 31,46 + 3,39∙10^-3∙1000 – 3,77∙10^5/1000² = 35,07 Дж/(моль∙К)
ΔСрº1600(О2) = 31,46 + 3,39∙10^-3∙1600 – 3,77∙10^5/1600² = 37,70 Дж/(моль∙К)
ΔСрº1000 = 53,45 – 36,15 – 0,5 ∙ 35,07 = –0,235 Дж/(моль∙К)
ΔСрº1600 = 56,58 – 44,51 – 0,5 ∙ 37,70 = –6,78 Дж/(моль∙К)
ΔНº1000 = –635,09 –0,235 ∙ (1000 – 298) / 1000 = –635,25 кДж/моль
ΔНº1600 = –635,09 –6,78 ∙ (1600 – 298) / 1000 = –643,92 кДж/моль
ΔSº1000 = –106,08 –0,235 ∙ ln(1000/298) = –106,36 Дж/(моль∙К)
ΔSº1600 = –106,08 –6,78 ∙ ln(1600/298) = –117,47 Дж/(моль∙К)
ΔGº1000 = ΔНº1000 – TΔSº1000 = –635,25 – 1000∙(–106,36) / 1000 = –528,89 кДж/моль <0
ΔGº1600 = ΔНº1600 – TΔSº1600 = –643,92 – 1600∙(–117,47) / 1000 = –455,97 кДж/моль <0
Значения ΔGº в обоих сл. отрицательны, т.е. реакция окисления термодинамически возможна.
2) по формуле ΔGº(Т) = –2,3RТlgKp(Т)
ΔGº1000 = –2,3 ∙ 8,314 ∙ 1000 ∙ (–55,80) > 0 - нет реакции
ΔGº1600 = –2,3 ∙ 8,314 ∙ 1000 ∙ (–30,80) > 0 - нет реакции
Т.е. получились два взаимоисключающих ответа. Обратитесь к преподавателю. Буду рада получить его объяснение.
2) boring
3) summary
2. This dress has been designed by Calven Klen. (вообще-то пишется Calvin Klein)
A new bridge is being built.
A pink sweater will be knitted for me by my mother.
James was sent an invitation by Karen.
3. She said she enjoyed travelling a lot.
He said he had visited Spain the previous year.
He said travelling solo was the best thing he'd ever done.
Tim said he was looking for an interesting destination.
4. 1) unless
2) if
3) if
5. take, is looking, tastes, will trip, was cooking.