You're up then you're down The easy, fast & fun way to learn how to sing: 30DaySinger. more »īecome A Better Singer In Only 30 Days, With Easy Video Lessons! You change your mind Perry also performed the song on the Hello Katy Tour, California Dreams Tour, Prismatic World Tour and Witness: The Tour. "Hot n Cold" was nominated for the Grammy Award for Best Female Pop Vocal Performance at the 52nd Annual Grammy Awards. The song's music video, which was directed by Alan Ferguson, was released on October 1, 2008, and features Perry as a bride who is about to get married to her fiancé, who experiences a daydream in which she pursues him after he flees from the wedding. She also performed the song at the 2008 MTV Europe Music Awards, which she hosted. To promote "Hot n Cold", Perry marked the song's live debut with a performance on NBC's Today. To date, "Hot n Cold" has sold over 5.7 million copies in the US, making it one of Perry's highest-selling singles in the nation. It also became Perry's second top five single in the United Kingdom, Australia, Ireland and New Zealand, and topped the charts in Finland, Germany, Canada, Norway, Spain, and Denmark, among others. The song reached number three on the Billboard Hot 100, becoming Perry's second consecutive top three single, following "I Kissed a Girl". The lyrics address an unstable romantic relationship caused by a partner's mood swings. The track was released as the album's second single on September 9, 2008. Luke and Benny Blanco for her second studio album, One of the Boys (2008). Even if it wears out over time, this product is still worth the price, as it can only help you in the long term."Hot n Cold" is a song by American singer Katy Perry. I play a lot of sports in addition to marching band, and using it on muscles, or to warm up, makes this a great item. This means it is supersaturated again, and is ready for use. The heat pack can then be boiled in water again until clear gel appears. Once the sodium acetate form crystals, more heat energy is released, enough to dissolve the solid.
The salt is willing to dissociate up until the solution is saturated, at which point extra energy in the form of heat has to be added to force the sodium ion away.” The higher the temperature of the solution becomes, the more slat that is dissolved, which, at the same time, can absorb more heat energy. The musician, songwriter and producer also performed the same duties on ' I Kissed a Girl. Heat is the byproduct of this reaction…When sodium acetate dissolves in water it dissociates, meaning the sodium ion separates from the rest of the molecule. Songfacts®: This tale of a neurotic ex-boyfriend was produced and co-written by Dr. One site states it best: the salt creates “…a lattice of solid sodium acetate that turns the gel inside the pack opaque. This snapping starts a reaction throughout the entire solution, which causes the salt to crystalize.
The disk itself is concave, and snaps back and forth when pressure is applied. The metal disk breaks the unstable solution apart. This is known as supersaturation.” As my chemistry class is currently learning about electrons and configuration, I thought this tidbit about being unstable was relevant. Since the water is now holding a greater load of salt than it would otherwise accept, the resulting solution is very unstable. When brought back to room temperature, the sodium acetate does not return to its solid state, but creates a clear gel. One article states, “The salt – sodium acetate in this case – can be forced to dissolve even after saturation occurs by heating the solution.
the gel is usually sodium acetate in water or another different supersaturated solution. In these reusable packs, there is a metal disk and gel. That means that everything needed for the reaction to occur and reset itself is inside the pack. They are what’s considered a closed system. Some heat packs are single use, but the ones in the following article are multi-use.īefore you open a package, you need to know what’s in them. And what is a better topic than what I use, or something similar anyway, for marching band! Which, just for the record, is every bit as fun as it is cold! But these hot pack things, as I call them, are really wonderful. With the frigid weather that comes with the holidays, I decided to pick a, well, warmer topic.
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