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.
In June 2017, the iPad Pro's second generation hardware was announced to have 12.9 and 10.5-inch screens. Hardware Screen and input. The iPad's (first two generations) touchscreen display is a 1024 by 768 pixel, 7.75Ã5.82 in (197Ã148 mm) liquid-crystal display (diagonal 9.7 in (246.4 mm)), with fingerprint-and