Write the balanced chemical equations of each reaction:

a. Hydrobromic acid (HBr) reacts with Potassium bicabonate (KHCO3) to create Potassium bromide, Carbon dioxide and water.

b. Tin II oxide reacts with Nitrogen triflouride to create Tin II fluoride and Dinitrogen trioxide.

c. CH4 combusts in air to create carbon dioxide and water.

d. Aluminum phosphate reacts with Lithium nitrate to create Aluminum nitrate and Lithium phosphate.

A. HBr + KHCO3 >>> H20 + CO2 + KBr

B. 3SnO + F3N >>> 3F2Sn + N2O3

C. CH4 + O2 >>> CO2 + H2O

D. AlPO4 + 3LiNO3 >>> Al(NO3)3 + Li3PO4

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este