Showing posts with label 4 Rumus Penting Sukses Mengerjakan Soal Termokimia. Show all posts
Showing posts with label 4 Rumus Penting Sukses Mengerjakan Soal Termokimia. Show all posts

Tuesday, July 16, 2013

The Ashes: Jimmy Anderson, a captain's dream, says Ian Botham


Praise has been flowing in for England's 10-wicket star, Jimmy Anderson. The Lancashire paceman overcame cramps and thwarted a valiant Australian fight back as England won the first Ashes Test at Nottingham by 14 runs on Sunday.

This was the second time in his career that Anderson took 10 wickets in a match. Anderson's (5/85 + 5/73) at Trent Bridge were his best bowling figures versus Australia in a Test match. The first time he took 10 wickets or more in a match was a 11 for 71 versus Pakistan at Nottingham in 2010.

Former England Test captain Andrew Strauss is delighted at Anderson's transformation from a bowler who just wanted to bowl fast to an intelligent pacer who has the skills of making an old ball swing. Read: Match Report

"He used to bowl quickly but not accurately and the way he's refined himself as a bowler is extraordinary. He has a lot of skills -- reverse swing and regulation swing -- and he's become the complete bowler. On top of that, he's revelled in leading the attack and that's helped his bowling," Strauss told Sky Sports.

Anderson suffered cramps before lunch on Day 5 and England were left frustrated as the last-wicket pair of Brad Haddin and James Pattinson inched their way to the finish line. But Anderson returned to remove Haddin for 71, after successfully using the Decision Review System (DRS).

Botham said Man of the Match Anderson deserved to take the last wicket. "Anderson is a captain's dream," Botham said, adding: "He used to just want to be the quickest bowler in town, he's curbed that like Richard Hadlee and learned his skills and now bowls within himself. He has great control and that doesn't just happen."

The second Test starts at Lord's from Thursday.

Monday, July 15, 2013

'Robert Galbraith' and the Story Behind 7 Other Famous Pen Names

J.K. Rowling, author of the famed "Harry Potter" fiction series, confirmed Sunday she had published a crime novel titled "The Cuckoo's Calling" in April, using the pen name "Robert Galbraith" which loosely translates to "famous stranger" (Robert being derived from old Germanic for "fame" and "Galbraith" being a Scottish clan named after the Gaelic word for "British foreigner").

[READ: J.K. Rowling Revealed as Writer Behind Crime Novel]

Last week, The Sunday Times of London began investigating whether Rowling had actually written "The Cuckoo's Calling" when a mysterious Twitter user suggested she had to a Times columnist who had been raving about the book.

Rowling explained in statement released by her publicist, "It has been wonderful to publish without hype or expectation, and pure pleasure to get feedback from publishers and readers under a different name," and said doing so was a "liberating experience."

The "Harry Potter" author stands on well trodden ground in opting for a pen name to publish books. Here are some other famous anonymous authors and the stories behind their noms de plume:

The Brontë Sisters/ Currer, Ellis and Action Bell

Charlotte, Emily and Anne Brontë used the names Currer, Ellis and Action Bell, respectively, to publish a book of poetry together in 1846. They continued to use the names when they went on to separately publish their own novels, including "Jane Eyre" by "Currer Bell," "Wuthering Heights" by "Ellis Bell" and "Agnes Grey" by "Action Bell." In 1850, Charlotte cleared up the mystery behind the names. She wrote that the sisters had used them because there were "averse to personal publicity" and that they had taken the names, "Christian" and "positively masculine," because their "mode of writing and thinking was not what is called 'feminine.' "
  Mary Ann Evans/ George Eliot

Like the Brontë sisters, Mary Ann Evans took on a male pseudonym to publish her early works. "George" she chose after the name of her romantic partner, George Lewes, and "Eliot" because she said it was "a good mouth-filling word." The success of her novel "Adam Bede" forced her to come forward and the revelation of her affair with Lewes – who was married to another woman – caused great controversy.
 Charles Dickens/ Boz
 Charles Dickens used the name "Boz" to publish his early short stories, or "sketches," as he called them. He later explained that the name came from his pet name for his brother, who he called "Moses" after a character in the "The Vicar of Wakefield." "Moses" when pronounced nasally, came out "Boses" which Dickens further shortened to "Boz."
 Charles Lutwidge Dodgson/ Lewis Carroll
 True to his methodical form, the "Alice's Adventures in Wonderland" author translated his name, Charles Lutwidge to Latin (Carolus Ludovicus), flipped his first and last names, and translated it loosely back to English, to come up with Lewis Carroll. His publisher ultimately chose the name among a list of other names Dodgson offered him.
 Samuel Clemens/ Mark Twain
 Clemens played around with a number of pseudonyms, but the name that made him famous came from a familiar phrase on the Mississippi riverboats Clemens grew up working on. "Twain" is archaic way of saying "two" and "mark" a term to declare maritime depth, measured in fathoms, thus "mark twain" was often shouted to mean "the depth is two fathoms." In "Life of the Mississippi" Clemens actually credited another boat captain who would sign his dispatches to the local paper with "Mark Twain" for the idea.
 Steven King/ Richard Bachman
 Early in his career, King also published work under the name "Richard Bachman," because at the time he thought publishing more than one book a year wasn't really accepted in the publishing world. He didn't put much thought into it, King has said. When the publishing company called him asking for a name, he took "Richard" from a Richard Starks novel (coincidentally also a pseudonym) sitting on his desk and "Bachman" from a song by Bachman Turner Overdrive playing on his record player.
 Eric Blair/ George Orwell
 Though George Orwell, née Eric Blair, signed his early works and reviews with his birth name or initials, he asked his publisher if "Down and Out in Paris and London" could be published under a pseudonym, "as I am not proud of it," he wrote. Scholars take this to mean that he both feared his book might be failure, and that he didn't want to harm his family's reputation with his "down and out" antics described in the book. The publisher suggested simply "X," but Blair wanted something better that he could use again "if this book doesn't flop as I anticipate." He suggested "George Orwell" among a few others. Orwell indeed continued to use the name for his future novels, but a few days before his death, requested to be buried under his birth name of Eric Blair.

Sunday, November 4, 2012

4 Rumus Penting Sukses Mengerjakan Soal Termokimia

Apakah anda mengalami kesulitan dalam belajar bab Termokimia? Kalau jawaban anda “Ya” maka saya rasa anda wajib untuk membaca kelanjutan artikel ini. Gimana dengan anda yang sudah lancar mengerjakan soal-soal Termokimia? Saya rasa teruskan saja membaca artikel ini, barangkali saja bisa menambah referensi anda, tul kan he he he hehe.

Menurut pengalaman saya ada 4 macam rumus utama yang bisa digunakan untuk menyelesaikan soal-soal termokimia, yaitu:

1. Rumus Kalorimeter
Rumus ini sering dipakai apabila kita ingin mencari energi panas yang dihasilkan dari pencampuran dua buah larutan atau untuk mencari energi panas yang terlibat dalam reaksi yang dilakukan dengan menggunakan calorimeter. Contoh soal seperti ini misalnya larutan NaOH dicampur dengan larutan H2SO4 dan kemudian kita disuruh mencari panas netralisasi, atau suatu zat dibakar dalam calorimeter kemudian panas yang dihasilkan ditransfer dalam air didalam calorimeter dan kita disuruh mencari panas pembakaran zat tersebut.
Oh ya jika diketahui kalor jenis ( c ) zat maka gunakan rumus Q=mc? T tapi kalau yang diketahui kapasitas panasnya ( C ) maka gunakan rumus Q=C? T

2. Rumus Entalpi Pembentukan
Rumus ini dipakai apabila dalam soal kita disuruh mencari entalpi suatu reaksi dan yang diketahui adalah data-data entalpi pembentukan dari masing-masing spesies dalam reaksi. Contoh tipe soal dengan penyelesaian rumus ini adalah sebagai berikut:
“Hitung entalpi reaksi A + B -> C + D jika diketahui entalpi pembentukan A =….KJ/mol, B= …KJ/mol, C = …KJ/mol dan D=…KJ/mol”
3. Rumus Energi Ikatan
Rumus ini dipakai untuk menyelesaikan soal-soal yang diketahui data energi pemutusan ikatan / data pembentukan ikatan. Contoh dari soal ini adalah sebagai berikut:
“Hitung reaksi CH4 + O2 -> CO2 + H2O jika diketahui data energi ikatan C-H = …KJ, O=O=…KJ, H-O=…KJ dan seterusnya.”
4. Rumus mencari entalpi reaksi dengan dasar hukum Hess
Soal-soal dengan penyelesaian seperti ini tandanya adalah terdapat data sejumlah reaksi dan akhirnya kita disuruh mencari entalpi reaksi tertentu. Cara nya adalah dengan mengatur kembali reaksi-reaksi yang ada sehingga jika reaksi-reaksi tersebut dijumlahkan maka akan kita peroleh reaksi yang ditanyakan. Contoh soalnya adalah memiliki cirri-ciri sebagai berikut:
“ hitunglah entalpi reaksi A + E -> B + F jika diketahui;
A + D -> C + B ?H = …KJ/mol
B + D -> F ?H = …KJ/mol
E + F -> C + D ?H = …KJ/mol”
Nah yang perlu diingat disini adalah bahwa data entalpi yang ditulis di buku adalah dalam satuan KJ/mol, contohnya entalpi pembentukan CO2 adalah ?H = -394 KJ/mol, ini berarti pembentukan 1 mol CO2 akan membebaskan energi sebanyak 394 KJ. Jika di dalam soal yang ditanyakan misalnya 0,5 mol, 2 mol, atau 3 mol maka tentunya anda harus mengkonversi terlebih dahulu besar entalpi ini.