The Enthalpy of Combustion of Hydrogen Gas Is -285 104 Kg Satellite with Enough Kinetic Energy to Reach the Provide
The enthalpy of combustion of hydrogen gas is -285.8 kJ/mol.To provide a 2.20 104 kg satellite with enough kinetic energy to reach the escape velocity of Earth (roughly 11.2 km/s) ,how many kilograms of H2 must be burned? (Kinetic energy =
mv2,where mass is in kg and velocity is in m/s; 1 J = kg . m2/s2)
A) 1.95 104 kg
B) 4.83 103 kg
C) 2.49 105 kg
D) 9.75 103 kg
E) 8.62 102 kg
Correct Answer:
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