Home
Class 11
CHEMISTRY
Standard molar enthalpy of combustion of...

Standard molar enthalpy of combustion of glucose is -2880 kJ. If only 25% of energy is available for muscular work and 1.0 km walk consumes 90 kJ of energy, what maximum distance (in km) a person can walk after eating 90 g of glucose.

Text Solution

Verified by Experts

The correct Answer is:
4
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • THERMODYNAMICS

    NARENDRA AWASTHI ENGLISH|Exercise Level 2|40 Videos
  • STOICHIOMETRY

    NARENDRA AWASTHI ENGLISH|Exercise Match the Colum-II|6 Videos

Similar Questions

Explore conceptually related problems

The enthalpy change involved in the oxidation of glucose is -2880kJ mol^(-1) . Twenty five per cent of this energy is available for muscular work . If 100kJ of muscular work is needed to walk one kilometre, what is the maximum distance that a person will be able to walk after eating 120g of glucose ?

The enthalpy change involved in the oxidation of glucose is -2880 kJ mol^(-1) . Twenty five per cent of this energy is available for muscular work. If 100 kJ of muscular work is needed to walk one kilometre, what is the maximum distance that a person will be able to walk eating 120 g of glucose ?

The enthalpy of combustion of mol. Wt. 180 glucose is -2808 KJ "mol"^(-1) at 25^(@) C . X and Y grams of glucose do you need to consume respectively cases [Assume wt=62.5 Kg]. (a) to climb a flight of stairs rising through 3M. to climb a mountain of altitude 3000 M? Assume that 25% of enthalpy can be converted to useful work. X and Y are related as X=mY, then find m.

If 150 kJ of energy is needed for muscular work to walk a distance of one km, than how much of gulcose one has to consume to walk a distance of five km, provided only 30% energy is available for muscular work.The enthalpy of combustion of glucose is 3000 kJ mol^(-1)

If 150 kJ of energy is needed for muscular work to walk a distance of one km, than how much of gulcose one has to consume to walk a distance of five km, provided only 30% energy is available for muscular work.The enthalpy of combustion of glucose is 3000 kJ mol^(-1)

Photosysthesis si a bio process by which plants make energy rich molecules from low energy molecules with the help of energy from sunlight . The photosysthesis of glucose can be represented as: 6CO_(2(g))+ 6H_(2)O_(g) + hv rarr C_(5)H_(12)O_(6(s)) + 6O_(2)(g)..........(i) The energy of one mole of a photon of wave lenght is known as one Einstein. Heats of combustion of graphite and hydrogen at 298K are -393.5 KJ"mol"^(-1) and -285.8 KJ"mol"^(-1) respectively. If on combustion 1 g of glucose releases 15.58 KJ of energy , Calcualate the heat of formation of glucose at 298 K.

Animals operate under conditons of constant pressure and most of the process tht maintain life are isothermal ( in a broad sense) . How much energy is available for sustaining this type of muscular and nervous activity from the combustion of 1mol of glucose molecules under standard conditons at 37^(@) C (blood temperature) ? The entropy change is +182.4 JK^(-1) for the reaction stated above DeltaH_("combustion") [glucose]=-2808 KJ

Photosynthesis is a bio process by which plants make energy rich molecules from low energy molecules with the help of energy from sunlight . The photosynthesis of glucose can be represented as: 6CO_(2(g))+ 6H_(2)O_(g) + hv rarr C_(5)H_(12)O_(6(s)) + 6O_(2)(g)..........(i) The energy of one mole of a photon of wave lenght is known as one Einstein. A weight lifter lifts a weight of 160Kg through of 2.4 m . Assuming all the energy required for this task is obtained by the combustion of glucose , calculate the change in the current produced by a sample of blood of the weight lifter . Same volume of blood (5mL) is tested both before and after lifting the weight and the total volume of blood in his body is 5L. (1 g of glucose releases 15.58 KJ of energy )

Gasoline has an enthalpy of combustion 24000 kJ/mol gallon. When gasoline burns in an automobile engine, approximately 30% of the energy released is used to produce mechanical work. The remainder is lost as heat transfer to the engine's cooling system. As a start on estimating how much heat transfer is required, calculate what mass of water could be heated from 25^(@)C to 75^(@)C by the combustion of 1.0 gallon of gasoline in an automobile? (Given : C(H_(2)O)=4.18 J//g^(@)C )

The standard enthalpies fo formation of CO_(2) (g), H_(2) O (1) , and glucose (s) at 25^(@)C are - 400 kJ mol^(-1), - 300 kJ mol^(-) , and - 1300 kJ mol^(-1) , respectively. The standard enthalply of combustion per gram of glucose at 25^(@)C is