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8452 Demonstrate knowledge of the behaviour of gases

NZQA Expiring unit standard

8452 version 8


Page 2 of 2

NZQA EXPIRING UNIT STANDARD 8452 VERSION 8 PAGE 2

Title

Demonstrate knowledge of the behaviour of gases

Level

4

Credits

2


Purpose

People credited with this unit standard are able to: demonstrate knowledge of the relationships among pressure, volume, temperature, and the amount of a gas; and compare real gases and ideal gas behaviour.


Classification

Science > Chemistry


Available grade

Achieved


Guidance Information


None.


Outcomes and performance criteria


Outcome 1


Demonstrate knowledge of the relationships among pressure, volume, temperature, and the amount of a gas.


Performance criteria


1.1 Normal Temperature and Pressure (NTP) and Standard Temperature and Pressure (STP) are defined in terms of reference conditions.


1.2 Calculations involving gases are performed using methods consistent with the processes of algebra, the gas laws, and the required value.


1.3 Gas behaviour to Dalton’s Law of Partial Pressure and Graham’s Law of Diffusion are described in terms of their relationship.


Outcome 2


Compare real gases and ideal gas behaviour.


Performance criteria


2.1 The assumptions underlying an ideal gas are described in terms of gas behaviour.


2.2 The Van der Waals equation is used to explain the deviation of real gases from ideal behaviour.



This unit standard is expiring. Assessment against the standard must take place by the last date for assessment set out below.


Status information and last date for assessment for superseded versions

Process

Version

Date

Last Date for Assessment

Registration

1

24 September 1996

31 December 2014

Revision

2

19 February 1998

31 December 2014

Review

3

23 November 1999

31 December 2014

Review

4

18 June 2010

31 December 2022

Rollover

5

27 January 2015

31 December 2022

Rollover and Revision

6

15 June 2017

31 December 2022

Revision

7

26 October 2017

31 December 2022

Review

8

22 October 2020

31 December 2022


Consent and Moderation Requirements (CMR) reference

0113

This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.

NZQA National Qualifications Services

SSB Code 130301

Ó New Zealand Qualifications Authority 2022



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Tags: expiring unit, version, standard, expiring