Zadanie 14c
Wzorowane na: Chemistry HL Paper 3, November 2023, TZ1, pytanie 14(c). Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Informacja do zadań 14b-14c.
Natural gas is burned in power stations and used for heating in homes.
Polecenie
Outline one advantage and one disadvantage, other than cost, of burning natural gas instead of coal in a power station.
Advantage:
Disadvantage:
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
Advantage, any one of:
less carbon dioxide released per unit of energy
OR
no ash and less soot/sulfur dioxide, so cleaner combustion
OR
more energy released per unit mass ✔
Disadvantage, any one of:
leaks release methane/a powerful greenhouse gas
OR
highly flammable/explosive when mixed with air
OR
a gas is harder to store and transport «has to be compressed or liquefied»/has a lower energy density by volume ✔
Schemat punktowania
M1: a specific advantage. M2: a specific disadvantage. Vague statements such as 'less pollution', 'clean fuel' or 'hazardous' earn nothing; do not accept the converse of the advantage as the disadvantage.