A gas is confined to cylinder under constant atmospheric pressure. When the gas undergoes a particular chemical reaction, it releases 79kJ of heat to its surroundings and does 18kJ of P-V work on its surroundings. What are the values of ?H and ?E for this process?
.Two gases A and B are confined in a cylinder and a piston arrangement . Substances A and B react to form a solid product
A(g) +B(g) ?C(g)
As the reaction occurs, the system loses 1150J of heat to the surroundings. The piston moves downward as the gases react to form a solid. As the volume of gas decreases under constant pressure of the atmosphere, the atmosphere, the surroundings do 480J of work on the system. What is the change in the internal energy of the system? (5mrks)
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