Deing an appropriate sketched p-v diagram, outline the four stages of the carnot cycle. 2he upper temperature of the engine is 330 k; the lower temperature is (1 marks) 278 k (0/ annotate your sketched diagram in 3(a) with this information. calculate the thermodynamic efficiency of the engine. (4 marks) (c) the isothermal expansion stage of the engine increases the volume o mole of an ideal gas present in the engine from 400 cm3 to 600 cm ( given that the expansion is reversible, what is the work done by the engine in this stage? (3 marks) use the information given in 3(b) and your answer in 3(c)(0) to calculate the entropy change of the engine in this stage of the expansion. (ii) (5 marks) (ii) use the information given in 3(b) to calculate the final volume of the engine, after both expansions.

can you attach a picture of the lettuce? : )

its going to be mutualism cuz they both benefit from the relationship.

~batmans wife dun dun

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms