Given CH2(g) + 2O2(g) - CO2(g) + 2H2O(1) AH° = -890.4 kJ, the standard enthalpy of
formation of CO2(g) = -393.5 kJ/mol, and the standard enthalpy of formation of H20(1) =
-285.9 kJ/mol,

calculate the standard enthalpy of formation of CH4(g).

A. +74.9 kJ
B. -74.9 kJ
C. -149.8 kJ
D. +149.8 kJ

In a chemical reaction at equilibrium, the rate of the forward reaction the rate of the reverse reaction. if the rate of the forward reaction more products are formed.

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign