CH-1218
Exothermic and endothermic reactions
Chemistry · Secondary 4 · Medium · Exothermic and endothermic reactions
A student compares two fuels, P and Q. When 1.0 g of P is burned completely, 30.0 kJ of heat is released. When 1.0 g of Q is burned, 22.5 kJ of heat is released.
What is the energy change when 2.0 g of Q is burned completely?
What is the energy change when 2.0 g of Q is burned completely?
- +22.5 kJ
- +45.0 kJ
- −22.5 kJ
- −45.0 kJ
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