Worksheetsжылу
Total questions: 8
Worksheet time: 3mins
What is the name of the amount of heat released or absorbed by the chemical system during the course of a chemical reaction in it:
chemical reaction
chemical reaction equation
thermal effect of the reaction
exothermic reaction
The equations of chemical reactions in which the thermal effect is indicated are called:
thermochemical equation;
endothermic reaction
chemical reaction
thermal effect of the reaction
Which of the proposed reaction equations are exothermic?
2H2O = 2H2 + O2 – Q
HCI + NaOH = NаCI + H2O + Q
CaCO3 = CaO + CO2– Q
Ca(OH)2=CaO + H2O -67 kJ
Which of the proposed reaction equations are endothermic?
HCI + NaOH = NаCI + H2O + Q
N2 + 3H2 = 2NH3 + Q
S+O2=SO2+ 297 kJ
H2 +CI2 = HCI- 185 kJ
The reaction, the equation of which is N2+ O2 → 2 NO - Q, refers to the reactions:
endothermic reaction
exothermic reaction
chemical reaction
exothermic decomposition
From the following chemical reactions determine the thermochemical reaction
Ca(OH)2 = CaO + H2O
S + O2 = SO2 + 297 кДж
3H2 + N2 = 2NH3
2Cu + O2 = 2CuO
The prefix exo means:
left
inside
right
outside
The reaction, the equation of which is 2SO2+ O2 → 2SO3 +198KJ, refers to the reactions:
exothermic reaction
chemical reaction
chemical reaction equation
endothermic reaction
