The enthalpy change that accompanies a reaction is called the enthalpy of reaction (DHrxn). It is sometimes convenient to provide the value for DHrxn along with the balanced chemical equation for a reaction (also known as a thermochemical equation): 2H2(g) + O2(g) -> 2H2O(g) DH = -483.6 kJ.
It is the most recent in 9.7 inch iPad version. The display is also Retina with a huge resolution of 2048 x 536 pixels at 264 ppi. This new iPad retained the size 9.7 inches display size(250 mm) and also the LED back-lighting technology, plus fingerprint and scratch resistant coating. Random Access Memory is also the same: 1024 MB DDR II. The 4th generation iPad has the fastest processor, called Apple A6X. CPU features a 1.4 GHz dual core.
Gaming could also come to the device in a big way, with downloadable games in the App Store and support for third-party gaming controllers. Inside, the Apple TV would get a significant specs bump, with a much faster processor. Apple is expected to announce a new professional-level iPad aimed at the enterprise. The tablet would be as large as a laptop: 12.9-inches. It could have an ultra high-resolution display, Touch ID fingerprint sensor, and possibly a stylus and USB port. An iPad for enterprise would make sense for Apple.