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.
More RAM, great screen, and better keyboard will all shine... once iOS 11 is out. 1  The 10.5-inch iPad Pro. 2  The 10.5-inch Pro (left) next to the outgoing 9.7-inch version. 3  10.5-inch on the left, 9.7-inch on the right. 4  From bottom to top: 12.9-inch Pro, 10.5-inch Pro, 9.7-inch Pro, iPad 5.