. One mole of hydrogen gas burns in excess of oxygen to give
290 kJ of heat. What is the amount of heat produced when 4 g
of hydrogen gas is burnt under the same conditions?

(a) 145 kJ

(b) 290 kJ

(c) 580 kJ

(d) 1160 kJ

Answer Posted / indra kant jha

1 MOLE=ATOMIC WEIGHT OF HYDROGEN (H2)=1*2=2GMS.
SINCE 2gms of hydrogen produced heat of 290kj
hence 1gms of hydrogen produced heat of 290/2 kj
hence 4gms of hydrogen will produce heat of 290/2*4=580kj.

Is This Answer Correct ?    22 Yes 2 No



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