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Worksheetsexothermic and endothermic reactions
Total questions: 10
Worksheet time: 5mins
Exothermic processes
making ice cubes
formation of snow in clouds
condensation of rain from water vapor
a candle flame
Endothermic processes
evaporation of water
melting ice cubes
forming a cation from an atom in the gas phase
conversion of frost to water vapor
Endothermic
boiling substance
evaporation of water
go with energy absorption
solid melting
exothemic
turns to ice
go with energy absorption
come with energy release
became cold
Reactions proceeding with the release of heat and light are called reactions
decomposition
burning
exothermic
endothermic
Which entry corresponds to the endothermic reaction?
С(тв) + O2(г) = СO2(г) + 394 кДж
СаСO3 = СO2 + СаО – 310 кДж
Н2 + I2 = 2HI + 52 кДж
3Fe + O2 = Fe3O4 + 118 кДж
The reaction equations are given:
А. СаО + Н2О = Са(ОН)2+Q
Б. 2HgO = 2Hg + O2-Q
Identify the type of reaction
both reactions are exothermic
both reactions are endothermic
A is endothermic, and B is exothermic.
A is exothermic, and B is .endothermic
In the above reaction equations, highlight the endothermic reaction:
С + O2 = СO2
H2 + Cl2 = 2HCl
4Р + 5О2 = 2Р2О5
2H2O = 2H2 + O2
According to the thermochemical equation of the reaction 3H2 + N2 = 2NH3 + 90 kJ, the volume of hydrogen, if 450 kJ of heat was released in the reaction:
336 л
67,2 л
224 л
672 л
30 kJ are released per 1 mol of matter, how much 10 mol is released
300
200
100
3000
