At a festival, spherical balloons with a radius of

110.cm

are to be inflated with hot air and released. The air at the festival will have a temperature of

25°C

and must be heated to

100°C

to make the balloons float.

3.00kg

of butane

C4H10

fuel are available to be burned to heat the air. Calculate the maximum number of balloons that can be inflated with hot air.

Here are some data you may find useful:

Specific heat capacity of air: 1.009J·g°C

Density of air at 100°C: 0.946kgm3

Density of butane at 100°C: 1.898kgm3

Formation enthalpy of butane at
25°C: ?125.7kJmol

Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]